1. Function: Built-in microphone, you can answer the phone, listen to music, etc.
2. Sponge wrapped around the speaker, soft Q, reduce the pressure on the ear
3. Battery life: in the case of a full charge, you can play 13-14 hours, no low battery tips sleep at ease
4. Bluetooth protocol: 5.0
5. Transmission range: 10 meters or more without obstacles
6. Sound channel: bilateral stereo
7. Use: head-worn
8. Size: suitable for head circumference 45-62 cm