TWS Airdots Headset Bluetooth 5.0 Earphone Headphone Stereo Earbuds

BT Version: 5.0 

Transmitting Distance: 10m/33ft 

BT Protocol: HFP, A2DP, HSP, AVCRP 

Frequency Range: 20-20000Hz 

Sensitivity: 98dB 

Impedance: 16? 

Charging Box Capacity: 3.7V 300mAh 

Earphone Battery Capacity: 2 x 3.7V 40mAh 

Music Play Time: about 4 hours (depends on music volume) 

Charging Time: about 1.5 hours for earphones, 2 hours for charging box 

Earphone Size: 26.6*21.6*16.4mm/1.04*0.8*0.64 inch 

Charging Box Size: 62*40*27.2mm/2.44*1.57*1.07 inch