New J2 Bluetooth Headset Dual-ear in-ear TWS Digital Display with Compartment Stereo Touch Business Sports Headset

J2 parameter: Bluetooth version: V5.3 Bluetooth distance: about 10M Charging room battery: 180MAH Earphone battery: 30mAh Speaker: F10 Listening to music and conversation time: about 3 hours Charging time: about 1 hour Frequency: 20Hz-20KHz The impedance is 32 ohms. Sensitivity 115dB/mW Waterproof grade: Lifetime waterproof Packaging size: 13.5 * 9 * 3.3CM Packaging weight: 85G Charging compartment size: 6 * 4.5 * 2. CM Charging case+headphone weight: 65G Accessories: one manual, one charging cable, one charging compartment, one lanyard, two earphones if necessary.