1. Material: ABS+Zinc Alloy+Silicone.2. Size: 54*30*33mm. Weight: 41g/pair.3. Battery capacity: 50mAh, charging for 15 minutes, Micro charging port.4. Use time: 24 hours of continuous use; 90 days of standby.5. Suitable for 4-7 inch mobile phones,thickness?13mm6. 4-speed speed adjustment; alloy mechanical buttons, no delay, second rebound.7. Shooting mobile games with customizable buttons (PUBG,free fire).