- Bluetooth 5.4; Chip: Blue trum 5656C-2. Battery capacity: Charging case 300mAh; Headset 40mAh-3. Usage time: 7 hours-4. Material: ABS; Size: 61 * 48 * 27mm; Total weight: 46.5g-5. Support Hall switch, master-slave switching, summoning Siri and other functions