1. Material: ABS+PC 2. Power cord: 0.5m Type-c charging cable 3. Function: audio reception, transmission 4. Battery capacity: 200mAh 5. Real-time display of power, Type-C interface charging, built-in 200mAh rechargeable lithium battery, durable 6. Get rid of the constraints of wired headphones and speakers, flexible operation, enjoy the fun of games 7. Transmitter mode: connect to audio output devices, transmit Bluetooth signals, and play music through paired wireless headphones and Bluetooth speakers 8. Receiving mode: connect to the audio player of the speaker, receive Bluetooth signals to play music wirelessly 9. Built-in microphone, clear hands-free calls, hands do not leave the steering wheel, safer driving 10. Switch button to switch TX or RX mode 11. Net weight: 14g 12. Size: 12.3x2.5x1.7cm