Specifications:
1.Bluetooth chip/Version:REALTEK 5.0+EDR
support both earbud microphones,auto pairing & connection.
2.Bluetooth protocol：
1)HSP1. 2)HFP1.6, A2DP1. 3) AVRCP1.5
3.Power Input: 3.2V-4.2V
4.Output: 30mW
5.Load : 32Ω /φ8
6.Power rating: 74mW
7.Earbud battery：65mAH(one-side),protective polymer battery
8.Charging box battery：500mAH，protective polymer battery
9.Charging power：earbud:5V/1mA，charging box: 5V/1mA
10.Transmit range：20 meters
11.Frequency：2.4GHz-2.48GHz
12.Talking time：around 9 hours
13.Listening music time：around 7 hours
14.Standby time：around 360hours
15.Weight: single earbud: 6g；charging box: 45g
16. Charge box can charge 3 times for eabuds
17.Earbud charging time: around 1 hour