Eson Style Bluetooth V4.1 W13 TWS Bluetooth earphones with charging box

1 Compliant with Bluetooth 4.1 + EDR, supporting HSP / HFP / A2DP / AVRCP protocol. 2 Support phone handsfree function! 3 Specification: (Bluetooth function) all in one function button and 2 LED (blue) (red), left / right (multi-function key / play / pause). 4 Transmission distance: 10 meters 5 Output maximum power: 10MW 6 channels: two-channel 7 SNR : ≥ 90DB 8 Frequency response range: 20Hz-20KHz 9 Distortion THD: ≤0.08% 10 Speaker Unit: OD 8mm, internal magnetism 11 Rechargeable battery capacity: 3.7V / 1200-2600mAh (default 2200mAh) 12 Power parameters: Rated voltage: 3.7V DC Headset charging time: about 30min 13 User parameters: single headset playback time: listen to music about 2 hours or more, call about 2.5 hours; battery box for headset charging 15-30 times (laboratory environment, the normal music volume, battery box battery 1200-2600mAh) 14. Standby time: more than a week