Sports wireless charging in-ear

Bluetooth version: Bluetooth5.0
Support protocol: AVDTP1.3/AVDTP1.4/GVRADP1.3/A2DP1.3
/HFP1.7/HSP1.2/AVRCP1.6/SPP1.2/GATT1.0
Bluetooth range: 10m/3.6Ft/360 degrees
Battery capacity: 50mAh*2
Charging time: 1.5-2 hours
Standby time: about 71 hours
Talk time: about 4 hours
Music playback time: about 4.5 hours
Speaker size: 6mm
Frequency: 20Hz-20000Hz
Impedance: 16Ω
Sensitivity: 94±3db
Host output: 3.7V-4.2V
Charging box battery: 700mAh
Charging box size: 65.31*33mm