Bluetooth Version: 5.0 JL6973D4
Battery inside earphone: 40mAh with 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
LED display in charging case
injection color: White or Black
Closed box packing