USB-BT540

Bluetooth 5.4 USB Adapter

  • Latest Bluetooth 5.4 with Bluetooth Low Energy (BLE) for energy-saving wireless connectivity*
  • Up to 7 devices connection to engage all your Bluetooth devices in a single gadget
  • Ultra-small design for unmatched portability

*LE Audio is available only if supported by the OS.

USB-BT540
Hand plugs a USB dongle into a laptop, with icons below representing headphones, keyboard, mouse, game controller, smartphone, and tablet.
  • Earphone
  • Keyboard
  • Mouse
  • Game controller
  • Smartphone
  • Tablet

A user is plugging the USB-BT540 into the laptop to show easy connection.

Man and woman sit at a table smiling while using wireless headphones, mouse, and game controller connected to a laptop via an ASUS USB-BT540 dongle.

Two people are playing video games with all their wireless devices connected with the laptop through the USB-BT540.

Your ultimate solution for wireless connectivity

The USB-BT540 features the latest Bluetooth 5.4 technology, allowing you to connect up to 7 Bluetooth smart devices simultaneously. Enjoy faster connections, connect more devices, and extend your range like never before!
The picture shows a variety of user scenarios for the Auracast broadcasting features

The picture shows a variety of user scenarios for the Auracast broadcasting features

Auracast official logo
Play Button Pause Button
Pause
Auracast logo and a simulated soundwave video
Woman wears wireless headphones and smiles while listening to music from a laptop connected via an ASUS USB-BT540 dongle.
Comparison table shows LC3 audio codec compresses 1.5 Mbps to 192 Kbps and scores 4.69 out of 5 in audio quality, while SBC compresses to 345 Kbps and scores 4.15.
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High quality, Unparalleled Efficiency

The USB-BT540 features LC3 codec, allowing listeners to enjoy a more energy-efficient and high-quality audio experience, while significantly reducing device power consumption by about 50%.

Farther, faster!

Compared to adapters using Bluetooth 4.X, the USB-BT540 significantly boosts data transfer speed and range.
  • icon showing speed capability.

    Data transfer speed

    2X

  • icon showing transfer range.

    Data transfer range

    4X

  • Bluetooth 4.X

    Bluetooth 5.4

Always ready to connect

The USB-BT540 features a sleek, compact design that enhances your device's Bluetooth capabilities while maintaining aesthetics and portability.
Smartphone screen displays a file transferring interface while a laptop with an ASUS USB dongle shows icons representing image, video, and music file exchange.
  • Products certified by the Federal Communications Commission and Industry Canada will be distributed in the United States and Canada. Please visit the ASUS USA and ASUS Canada websites for information about locally available products.
  • All specifications are subject to change without notice. Please check with your supplier for exact offers. Products may not be available in all markets.
  • Specifications and features vary by model, and all images are illustrative. Please refer to specification pages for full details.
  • PCB color and bundled software versions are subject to change without notice.
  • Brand and product names mentioned are trademarks of their respective companies.
  • The terms HDMI and HDMI High-Definition Multimedia Interface, HDMI trade dress and the HDMI Logos are trademarks or registered trademarks of HDMI Licensing Administrator, Inc. in the United States and other countries.
  • WiFi 7 full functions support will be ready in Windows 11 2024 Platform (Windows 11 24H2) or later.
  • The actual transfer speed of USB will vary depending on many factors including the processing speed of the host device, file attributes and other factors related to system configuration and your operating environment.
  • Actual data throughput and WiFi coverage will vary from network conditions and environmental factors, including the volume of network traffic, building material and construction, and network overhead, result in lower actual data throughput and wireless coverage.
  • If you use the product in conjunction with a third party service, you are responsible for complying with the third party provider's terms and conditions and privacy policy and are also at the risk of such use. ASUS does not provide support or guarantee continuous integration support for products that are not part of ASUS.