Bluetooth receiving (RX), Bluetooth transmitting (TX), FM transmitting three in one. High-definition digital display screen, the working status and working mode are clearly visible. NFC function, the phone can be connected by touching it. Built-in 500mAh rechargeable battery. Long battery life. Support USB (U disk), TF card playback and launch. Support FM transmission. Support 5-8m infrared remote control. Built-in high-definition mic, support wireless music listening, hands-free calling, navigation. Product name: M6 NFC Bluetooth 5.0 Receiver and Transmitter Interface Type:Input: 3.5mm AUX+RCA+optical (Optical)+coaxial (Coaxial)+USB+TF interface Output: 3.5mm AUX+RCA Support optical input Supported formats: MP3/WAV/WMA/APE/FLAC/G729/M4A/ALAC/AMR/DTS/MIDI/G726/MTY Built-in battery: 3.7V/500mAh Charging time: about 2 hours Battery life: RX about 10H, TX about 8H Charging method: Micro-USB 5V/0.5A Compatible devices: for Android, for IOS system mobile phones and PADs, active speakers, power amplifiers, and Bluetooth speakers or earphones that support A2DP/protocol. Color: Black Material: Plastic+Metal Package Contents: 1 x Bluetooth adapter 1 x charging cable 1 x 3.5mm audio cable 1 x red and white RCA cables 1 x external remote control 1 x English instruction manual