i28

Product parameters:

BT Version : 5.0                                                                                                                                                                                                       
Speaker diameter:10mm 
Impedance:32ohm 
Sensitivity:102dB at 1kHz 
Frequency range:20Hz-20kHz
Working Voltage:3.7V
Supports A2DP/HFP/HSP/AVRCP
Earphone battery: 40mAh
Charging case battery:250mAh
Music time: about 3-4hours
Stand by: about 250hours
Wireless range: 10m