1. Bluetooth chip and Bluetooth version: BK3266, Bluetooth 5.0
2. Bluetooth protocol: HSP1.2, HFP1.6, A2DP1.3, AVRCP1.5
3. Frequency: 2.4GHz-2.48GHz
4. Transmission distance: 20 meters
5. Listening time: about 10 hours
6. Talk time: about 12 hours
7. Standby time: about 30 days
8. Headphone battery: 240mAh