Bluetooth Version: 5.0 JL6973D4
Battery inside earphone: 40mAh without protect PCB
Battery inside chargingcase: 320mAh with Protect PCB
Speaker: 10mm
Impedance: 32ohm
Frequency:20-20kHz
Sensitivity: 105dB+-3dB
Working time: 6-7hours
Standby time: 168hours
Digital display in charging case
injection color: white or black
closed box