Features: Protect the battery contacts from being exposed to oxidation for a long for time and prevent dust from entering. Prevent conductive particles from entering the battery contacts and cause a short circuit. Dustproof, waterproof, anti-foreign body, will not scratch the contacts, and it is not easy to fall off due to close contact with the interface. The battery cover does not hurt the body, built-in foam, has good cushioning, shock resistance, protects the body. Specifications: Material: Plastic Applicable models: For Mini 3 Pro Color: Black Net weight: 4.4g Size: Approx.4.7x2.1x1cm/1.85x0.83x0.39 inches Note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1 Set Dustproof Cover