1. Zinc alloy shell, hole design, open and close the cover with one hand easily. 2. Bluetooth 5.3, faster, more stable and lower power consumption. 3. Advanced biological diaphragms, 13mm large dynamic composite unit. 4. 300mAh large capacity, long battery life. 5. 13mm large dynamic coil black technology bionic diaphragm, enjoy HiFi sound quality experience. 6. Parameters: Standby time: 240h Single play time: 4h Charging mobile phone: 1.5h Battery life: 20h
