Feature:1. Support audio equipment with audio input interface, realize wireless audio reception and transmission, support automatic search and connection with Bluetooth devices, and realize transmission of wireless audio transmission 2. Built-in cancellation and ANC noise cancellation circuit, gorgeous stereo, the sound quality is more pure and beautiful, built-in enhanced signal transmission circuit, the connection is faster and more stable 3. Compatible with dual lossless audio formats, support AUX IN/OUT 4. Automatic memory connection function, simpler operation, more convenient connection, product connection is simple, without any tedious driver and download APP 5. Smart compatible, Android, IOS system mobile phone and PAD, and all Bluetooth audio devices 6. Built-in battery, long battery life 7. The launch state supports one to two functions, and supports stereo in launch mode 8. This product is connected to a Bluetooth device (such as a mobile phone), and the audio is input to other audio devices without Bluetooth function through the AUX interface, and connected to the playback device with AUX, and the audio is transmitted to the Bluetooth receiving device (such as a Bluetooth headset) through Bluetooth. Specification: Name: Bluetooth adapter Colour: black Material: ABS Input voltage: DC5V Battery capacity: 300mHa Working hours: 5hours Charging time: 2 hours Product size: 135x80x20mm Package weight: about 65g Package Contents: 1x Bluetooth Adapter 1x Audio Cable 1x USB Cable Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.