1. Bluetooth Chip and Bluetooth Version: Wind Tunnel WT200 Low Power Core V4.2+EDR, Ruiyu L8763 Ultra Low Power Chip V5.0+EDR
2. Bluetooth protocol: HSP1.2, HFP1.6, A2DP1.3, AVRCP1.5
3. Nominal voltage: 3.7V,. power: 3mW, current: 350ma, load description: 32, headphone battery: unilateral 65mAH, polymer battery with protective board, charging box battery: 500mAH, polymer battery with protective board, charging power: 5V/1mA, charging box 5V/1mA.
4. Transmission distance: 15 meters,. frequency: 2.4 GHz-2.48 GHz, listening time: 4.2 version about 3 hours, 5.0 version about 6 hours, call time: 4.2 version about 3 hours, 5.0 version about 6 hours, standby time: 4.2 version about 360h, 5.0 version about 680 hours
5. Charging time (headset): about 1.1 hours, charging time (charging box): about 1.5 hours, charging times (charging box): 3 times, single headset charging time (USB charging tank): about 1.5 hours.
6. single earphone weight: 7g, charge box weight: 45g, full weight: 150g
7. Packaging list: Bluetooth headset pair, package box set, instruction book, ear cap pair, ear hang pair, USB charging tank, charging line, charging box 1