BOROFONE BW02 Plus Wireless Bluetooth Earphone White 1. Bluetooth 5.1, chip: Jerry AC6973 2. Battery capacity: charging compartment 200mAh, earphone 30mAh 3. Talk/music time: 4 hours, 200 hours standby 4. Size: 44.3*44.3*21.5mm 5. Support master-slave switching, call Siri, modify pairing name, touch operation, do not support pop-up window 6. With charging cable