- Bluetooth 5.4; Chip: Blue trum AB5656B-2. Battery capacity: 300mAh; Charging time: 1.5 hours-3. Usage time: 32 hours; Standby time: 180 hours-4. Material: ABS+silicone+PU leather-5. Size: 196 * 190 * 89mm; Weight: 197g-6. Open design with zero contact between ears and earmuffs-7. Support Chinese and English prompt sounds: double-click the power button when not paired