Bluetooth Version: 5.0 JL6963 Battery inside earphone: 40mAh without protect PCB Battery inside chargingcase: 300mAh with Protect PCB Speaker: 10mm Impedance: 32ohm Frequency:20-20kHz Sensitivity: 105dB+-3dB Working time: 3-4hours Standby time: 168hours LED display in charging case injection color color box
