Model TWS5 1.Bluetooth version: Jerry Bluetooth v5.0. 2.Transmission distance: 10 meters 3.Battery charge: 400mAh. per ear: 45mAh. 4.Playback time: about 2.5-3.5 hours. 5.Headset function: adjust volume, switch songs, answer incoming calls, refuse to answer calls, hang up, Bluetooth playback, hands-free call, phone replay, Bluetooth reconnection, voice prompt, power display, magnetic charging. Headset parameters: 6. Horn: angular 6mm. 7. Sensitivity: 108 ±5dB. 8. Impedance: 32 Ω. 9. Frequency response: 20-20000 Hz. 10. Rated power: 15mW x 2. 11. Support protocol: HSP/HFP/A2DP/AVRCP. 12. Headset color: black / white / red / gray (4 colors). 13. Accessories include: English instruction manual for USB charging line