True bluetooth 5.0 dual calling TWS Earbuds with changing box with Touch Control

1. Plan version: Zhongke Blue Flood 5.0 bilateral call

2. Effective operating distance: 10m
3. Earphone battery capacity: 50mAH Battery capacity: 200mAH

4. Music playing time and talk time :4 hours

5. Headset standby time :45 hours

6. Earphone charging time :2 hours box charging time: 3 hours

7. Bluetooth protocol: A2DP1. 2 / AVRCP1.0 / HSP1.0 / HFP1.5
8.Loudspeaker specification: 8mm 32 ohm
9.Microphone sensitivity: 93 dB
10. Frequency response range: 20HZ-20khz