High-fidelity audio and low latency: This Bluetooth audio adapter supports both Bluetooth transmitter and receiver modes. Utilizing Bluetooth 5.4 technology, it ensures stable signal transmission and delivers lossless audio quality. Supports SBC HD decoding, high sampling rates, and clear audio, eliminating noise and static. Hands-free calling for safer driving: The Bluetooth receiver with a 3.5mm AUX interface is perfect for connecting to your car stereo, letting you share music on the go. Features echo and noise reduction technology for deep noise cancellation, a built-in microphone, and one-touch answer/hang-up. Stay focused and never miss a beat. Plug & Play, easy to use: Simply turn on the Bluetooth transmitter and receiver, connect to your wired device via the 3.5mm Aux port, and pair with your Bluetooth device in seconds. Supports stable and smooth wireless music transmission from up to 10 meters (33 feet). This Bluetooth transmitter and receiver is super mini-sized and supports playback while charging. Size: 3.8 x 1.5 x 0.7 cm (1.5 x 0.6 x 0.27 inches). 14-hour battery life and display: The Bluetooth transmitter and receiver features an LED digital display that clearly shows the volume, pairing mode (Tx/Rx), and battery level. After powering on, short press the multi-function button to check the real-time battery level, short press the “<” “>” buttons to switch between next/previous song, long press the previous/next track to adjust the volume. Broad compatibility: This Bluetooth audio transmitter and receiver offers perfect compatibility with wired speakers/headphones, home stereo systems, car stereo systems, computers, projectors, MP3/MP4 players, and in-flight entertainment systems.