Hi -Smart S7
Bluetooth : 5.0
transmission distance : 10 meters
Standby time :- 3 days
Bettery :- 200 mAh lithium Polymer battery
Charging time :- about 2 hours
Speaker size :- 10 mm
Sensitivity :- 88dB + 5dB
Impedance:- 32
Frequency response :- 2-20KHt
