The 5 Best Bluetooth Adapters of 2025: Easily Connect Older Computers, Cars, Speakers, & Gaming Devices Without Wires

In today’s world, where wireless connectivity has become a part of everyday life, Bluetooth adapters can add wireless functionality to older computers, cars, multimedia speakers, or gaming devices, enabling more convenient communication between devices and offering greater flexibility and user experience.

This article will provide an in-depth understanding of Bluetooth adapters, explaining how they work, discussing their main types, key factors to consider when purchasing, and highlighting the best product recommendations for 2025.

Top 5 Bluetooth Adapters of 2025

1. Gadgiox AI Vocal Remover & Bluetooth Adapter

A fun and practical music gadget with Bluetooth adaption.

This is a unique Bluetooth adapter (receiver) that not only allows you to wirelessly transmit music from your phone or computer to traditional "non-Bluetooth" speakers, amplifiers, car audio systems, or headphones but also features an AI chip that instantly removes the vocals from songs. This transforms any track into an instrumental version, turning your speaker into a karaoke machine.

The usage is very simple: first, connect the adapter to your speaker via a 3.5mm audio interface, then pair your phone or computer via Bluetooth. You can directly stream songs from Spotify, Apple Music, YouTube, or any other streaming app to your speaker. Additionally, the adapter has an M button that allows you to adjust the vocal removal intensity (100%, 75%, 0%), making it easy to switch between the original vocals and instrumental versions.

This Bluetooth adapter has a built-in 400mAh battery that provides up to 6 hours of usage and supports Type-C charging. It’s compact and space-saving, simply plug it into your speaker to use.

Whether it's for a family gathering, outdoor party, or casual singing practice, this Bluetooth adapter turns any regular speaker into a karaoke powerhouse, making singing easier and more fun.

Pros:

  • Effectively removes vocals from songs.
  • Simple operation, plug-and-play for instant vocal removal, described by users as a “magical gadget” and a “game changer”.
  • Lightweight and portable, usable at home, in the car, or at outdoor parties.
  • Built-in rechargeable battery (USB-C), lasts at least 6 hours on a full charge.

Cons:

  • Some vocals may still remain (background noise), especially noticeable when listening closely.

Verdict
The AI Vocal Remover & Bluetooth Adapter is a fun and practical music gadget. It not only adds Bluetooth functionality to traditional wired speakers, allowing you to easily play music wirelessly from your phone, tablet, or computer, but also instantly removes vocals from songs, turning regular music into karaoke tracks. Although the vocal removal effect may not be 100% perfect on some songs, it’s more than sufficient for family gatherings, outdoor parties, or impromptu singing practice.

2. ZEXMTE 5.4 USB Bluetooth Adapter

An affordable, compact, and efficient PC Bluetooth dongle.

The ZEXMTE 5.4 USB Bluetooth Adapter is designed for desktop or laptop computers that lack built-in Bluetooth. Simply plug it into a USB port to easily connect your computer with wireless headphones, speakers, keyboards, mice, and other Bluetooth devices.

Powered by the latest Bluetooth 5.4 chip, it offers lower power consumption, stronger anti-interference capability, and a more stable connection than Bluetooth 5.0 or 5.2. It supports dual-mode Bluetooth (BR/EDR + BLE), providing high-speed transmission for audio and file transfers while maintaining compatibility with low-energy devices like keyboards and mice. With EDR low-latency technology, it minimizes lag for smooth music playback and gaming. The transmission range can reach up to 30 meters in open spaces.

In terms of compatibility, it supports Windows 11/10/8.1/7 (32/64-bit) — plug and play for Windows 11/10/8.1, while Windows 7 requires a manual driver installation. Note: it does not support macOS, Linux, TVs, or car systems.

The adapter can connect up to 7 Bluetooth devices simultaneously, such as headphones, speakers, keyboards, mice, and game controllers, eliminating the need to constantly switch connections.

Its mini USB design barely protrudes when plugged in, keeping a clean look without blocking adjacent ports. It also features a small indicator light for easy pairing confirmation.

Pros:

  • True plug-and-play for newer Windows versions.
  • Supports multiple simultaneous device connections.
  • Strong connection even across rooms.
  • Stable audio streaming and responsive gaming with minimal lag.
  • Compact, unobtrusive design that blends seamlessly with your device.
  • Affordable and great value for the price.

Cons:

  • It may not automatically reconnect after shutdown, requiring manual removal and re-pairing.
  • Occasional sound distortion on certain systems (likely due to OS conflicts).
  • No dedicated status indicator.

Verdict
The ZEXMTE 5.4 USB Bluetooth Adapter is an affordable, compact, and efficient solution—perfect for Windows 10/11 users seeking a reliable wireless upgrade. However, potential buyers should be aware of its occasional reconnection and audio distortion issues.

3. Avantree Relay Airplane Bluetooth 5.3 Adapter

A Bluetooth audio transmitter designed specifically for airplanes and gyms.

The Avantree Relay is a Bluetooth audio transmitter designed for travel and workout environments. It converts traditional wired audio sources—such as airplane entertainment systems or gym equipment with a 3.5mm jack—into a Bluetooth signal, allowing you to use your own wireless headphones and completely avoid low-quality airline earphones and tangled cables.

In real-world use, it’s perfect for airplanes and gyms. Simply plug it into the headphone jack on your seat to wirelessly listen to in-flight movies or music, or connect it to a treadmill or stationary bike for a convenient wireless experience. It’s ideal for long flights or workouts where freedom of movement is essential.

The device offers excellent compatibility and is specially optimized for AirPods, Bose, Sony, and Beats headphones. Note that it functions solely as an audio transmitter, meaning it cannot connect to smartphones, Bluetooth speakers, car stereos, or hearing aids.

Function-wise, the Avantree Relay supports dual headphone sharing, allowing two people to listen simultaneously - perfect for couples or friends watching a movie together. It’s powered by Qualcomm aptX Adaptive codec support (including aptX, aptX Adaptive, aptX HD, aptX Low Latency, and SBC) and Bluetooth 5.3, ensuring stable transmission and clear sound quality. With Avantree’s 20+ years of wireless audio expertise, reliability is assured.

Battery life is also impressive - up to 20 hours on a full charge, more than enough for long-haul flights or all-day use. LED indicators and physical buttons make pairing and volume control straightforward and intuitive.

Pros:

  • Compact and lightweight - perfect for flights and gym use.
  • Supports dual headphone sharing.
  • Clear sound and low latency.
  • Long battery life - lasts through an 8-hour flight with half the charge remaining.
  • Stable connection and easy reconnection once paired.

Cons:

  • Pairing process is not very intuitive.
  • The 90° plug can be prone to bending or breaking in cramped airplane spaces.
  • Slightly expensive.

Verdict
The Avantree Relay is a compact, reliable Bluetooth adapter designed with travelers in mind, ideal for use on airplanes or in gyms. Its optimization for major headphone brands like AirPods, Bose, and Sony, along with dual-headphone sharing and 20-hour battery life, makes it stand out - though its pairing process and plug design still leave some room for improvement.

4. Nulaxy 54W [PD 36W & QC3.0 18W] Bluetooth 5.3 Car Adapter Charger

A fully featured and affordable car FM transmitter + charger for older vehicles.

The Nulaxy 54W Bluetooth Car Adapter Charger instantly upgrades any older car into a “smart vehicle.” Simply plug it into the cigarette lighter socket, and you’ll get fast charging for multiple devices, plus Bluetooth and FM transmission — allowing you to play music, use GPS navigation, and take hands-free calls through your car stereo. It’s like adding Bluetooth and CarPlay in seconds.

Equipped with the latest Bluetooth 5.3, it delivers faster and more stable connections. Whether you’re streaming music or taking calls, audio quality and reliability are significantly improved. It also offers bass boost and 5-color ambient lighting, turning your car into a mini KTV.
Charging-wise, it supports 54W total output (PD 36W + QC 18W), allowing you to fast-charge up to four devices at once - including iPhones, Androids, tablets, and even laptops.

For driving safety, it supports Siri and Google Assistant, so you can navigate or make calls completely hands-free. The raised button design ensures you can easily control it without taking your eyes off the road. Built-in protection features include over-current, over-voltage, overheating, and short-circuit protection, compatible with 12V–24V vehicles - covering most cars, SUVs, and trucks.

How to Use: Tune your car radio to an empty FM frequency. Set the Nulaxy transmitter to the same frequency. Connect your phone via Bluetooth (“NX16”), and you’re ready to enjoy music, calls, or GPS audio wirelessly through your car speakers.

Pros:

  • Easy Bluetooth pairing and FM setup - almost plug-and-play.
  • Fast charging for iPhone and Android. Ideal for long trips.
  • Built-in microphone with clear pickup.
  • Excellent value for its feature set.

Cons:

  • Some users report low volume, requiring both phone and car stereo to be turned up high.
  • Bass boost results vary — some find it powerful, others feel it muffled.

Verdict
The Nulaxy 54W Bluetooth Car Adapter Charger is a versatile, user-friendly, and affordable solution — perfect for older cars and users who need to charge multiple devices on the go. However, audiophiles or those seeking premium sound quality might find its audio performance slightly limited.

5. Techkey Long Range USB Bluetooth 5.4 Adapter

A well-built, stable, long-range Bluetooth adapter for PCs.

The Techkey Long Range USB Bluetooth 5.4 Adapter is designed to add the latest Bluetooth 5.4 functionality to desktop or laptop computers that lack built-in Bluetooth. Simply plug it into a USB port, and it instantly enables your PC to connect wirelessly with headphones, speakers, keyboards, mice, and other Bluetooth devices - ideal for users seeking a stable, long-distance connection.

Featuring Bluetooth 5.4 dual-mode (BR/EDR + BLE) technology, it delivers improved security, stability, and energy efficiency compared to older versions (5.3/5.0/4.0). With up to 3 Mbps transmission speed, it ensures faster pairing, stronger anti-interference capability, and lower latency for smoother audio and data connections.

With its Class 1 radio technology and external antenna, the adapter provides an impressive wireless range of up to 500 ft / 150 m in open spaces - far exceeding the typical 10-meter Bluetooth range. However, obstacles like walls, metal objects, or Wi-Fi interference can reduce actual coverage distance.

The device supports up to 5 simultaneous Bluetooth connections, making it suitable for multitasking across multiple peripherals. Note that it does not support 2.4GHz wireless mice or keyboards (those using separate USB receivers). It is compatible with Windows 11 / 10 / 8.1 systems, but not with macOS, Linux, car audio systems, gaming consoles (Xbox, PS4), or TVs.

Setup is straightforward - just plug it in, and it’s ready to use. No driver installation or internet connection is required, providing true plug-and-play convenience.

Pros:

  • Stable and reliable connection within 15 meters.
  • Auto driver installation on Windows 10/11 - no manual setup required.
  • Fast Bluetooth pairing and reconnection.
  • Solid, durable build - not a cheap plastic feel.

Cons:

  • Limited support for Linux/Ubuntu. May require re-plugging to reconnect.
  • Real-world range may fall short of the claimed 150 meters.

Verdict
The Techkey Long Range USB Bluetooth 5.4 Adapter is an excellent choice for Windows users who want a reliable, long-range Bluetooth solution for their PC. It’s well-built, easy to use, and pairs quickly with multiple devices. However, Linux users may encounter some compatibility issues, and the actual transmission distance may vary from the manufacturer’s claim.

What Is a Bluetooth Adapter and How Does It Work?

A Bluetooth adapter - also known as a Bluetooth dongle or Bluetooth receiver - is a small hardware device that adds Bluetooth connectivity to equipment that doesn’t have it built-in. It typically connects via a USB or audio jack port.

How it works:

  • Signal Transmission. The Bluetooth adapter sends wireless signals via radio waves.
  • Signal Reception. Another Bluetooth-enabled device (such as headphones or speakers) receives and decodes the signal.
  • Protocol Support. Most adapters come with a built-in Bluetooth protocol stack to ensure stable data transmission - for example, for audio streaming, file transfer, or input device control.

In short, a Bluetooth adapter acts as a bridge that enables non-Bluetooth devices to communicate wirelessly through Bluetooth.

Types of Bluetooth Adapters

Depending on the use case and connection interface, Bluetooth adapters can be categorized into the following types:

  1. USB Bluetooth Adapter. Plugs directly into a computer’s USB port. Commonly used with laptops and desktops for file transfer, audio connection, and peripheral pairing.
  2. Audio Bluetooth Adapter. Connects to speakers or car audio systems via a 3.5mm jack or RCA port. It can function as a receiver (to receive audio from a phone) or a transmitter (to send TV audio to Bluetooth headphones).
  3. Dual-Mode Bluetooth Adapter. Works as both a transmitter and a receiver. Often used to connect TVs or projectors with wireless headphones.
  4. Professional-Grade Bluetooth Adapter. Supports aptX HD and low-latency technologies, making it ideal for gaming, professional audio production, and high-definition video transmission.

5 Things to Consider When Choosing a Bluetooth Adapter

When selecting the right Bluetooth adapter, keep the following 5 key factors in mind:

1. Bluetooth Version

Bluetooth technology continues to evolve, with each version improving in speed, range, and energy efficiency.

  • Bluetooth 4.0 / 4.2. Ideal for basic data transfer and peripheral connections (like keyboards, mice, and headphones). Low power consumption, but limited range and speed.
  • Bluetooth 5.0. Twice as fast as 4.2, with up to four times the range while maintaining low power usage - great for audio streaming and smart home devices.
  • Bluetooth 5.2. Improves latency (LE Audio), supports multi-device connections, and increases bandwidth efficiency - perfect for audiophiles or gamers who need high-quality, low-latency performance.
  • Bluetooth 5.3 / 5.4 (latest standards). Further enhance energy efficiency and connection stability, becoming the new mainstream standard after 2025.

Tip: 
For simple peripheral connections, Bluetooth 4.2 is enough.
If you care about audio quality, gaming latency, or future compatibility, go for Bluetooth 5.0 / 5.2 or higher.

2. Compatibility

Ensure the adapter supports your operating system - whether it’s Windows, macOS, Linux, Android, or iOS.

Some systems (like Windows) may require driver installation for full functionality, while macOS or Linux might have limited compatibility with certain models.

Also, check whether it fits your use scenario:

  • Some PC adapters support only data transfer, not voice or game controllers.
  • Premium adapters often allow multi-device pairing (e.g., PC + headphones + phone), which is useful for multitasking or entertainment setups.

3. Audio Quality Support

If you plan to use your Bluetooth adapter mainly for music, video, or gaming, audio codec support is crucial. Common codecs include aptX, aptX LL (Low Latency), AAC, and LDAC, which affect both sound quality and delay.

  • aptX / aptX HD. Qualcomm’s codec offering near-CD-quality sound with low latency - great for music lovers.
  • aptX LL. Designed for A/V synchronization or gaming, reducing latency to around 40ms (virtually seamless).
  • AAC. Widely used on Apple devices, offering excellent compatibility and high-quality sound - ideal for iPhone, iPad, or Mac users.
  • LDAC. Sony’s high-resolution codec supporting up to 990 kbps, delivering near Hi-Res audio quality - perfect for audiophiles.

Tip:
For immersive music or video playback, choose an adapter that supports high-quality, low-latency codecs.

4. Transmission Range

Most adapters maintain stable connections up to 10 meters (33 ft) in open spaces - sufficient for home or office use.

However, walls, furniture, or wireless interference (like Wi-Fi routers or microwaves) can reduce effective range.

If you need extended coverage (large rooms, conference areas, or outdoor use), choose Class 1 adapters, which support 30–50 meters or more and offer better signal penetration and interference resistance.

5. Dual-Mode Functionality

Dual-mode Bluetooth adapters can act as both a transmitter and a receiver, offering greater flexibility:

  • As a transmitter, it can send audio from a TV, computer, or game console to Bluetooth headphones or speakers.
  • As a receiver, it can upgrade wired speakers or amplifiers into Bluetooth-enabled devices, letting you stream music from your phone or tablet.

For users who frequently switch between different use cases, dual-mode adapters eliminate the need for multiple devices - offering cost-efficiency and versatility.

Some premium models even feature auto mode switching, low-latency codec support, and multi-device connectivity for a smoother overall experience.

Above all, I hope this helps you choose the best Bluetooth adapter.

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