GT72 USB Wireless Audio Adapter LED Digital Display Bluetooth 5.4 Audio Receiver Transmitter ?2-in-1 Functionality: Seamlessly switch between receiving and transmitting modes with a single button press ?LED Display Screen: Real-time status monitoring with an LED digital display,providing clear visibility of the operating mode for easy and convenient use ?AUX Output: Equipped with AUX output for broader application and stronger performance,compatible with most audio input/output devices ?TF Card Playback: Supports TF card playback,allowing for instant plug-and-play functionality ?Bluetooth 5.4 Upgrade: Enhanced with Bluetooth 5.4 technology to eliminate delay and lag for a smooth audio experience ?Wide Compatibility: Suitable for all devices with audio input/output interfaces,making it perfect for upgrading cars,vintage speakers,and more to Bluetooth functionality ?Specifications: ?Bluetooth version: V5.4 ?Transmission distance: 10 meters ?Power supply: USB power supply ?Size: 66.2*25.5*14mm Package included: ?1 x Bluetooth Audio Adapter ?1 x Audio Cable ?1 x English User Manual ?Other items not include