1. Unique Magnetism Design --- BIGFOX iPhone 7 Plus/8 Plus battery case with Magnetic Suction Function works great with magnetic car phone mount holder, fully adjustable with 360rotation provided more convenience while you driving, and also the battery case can standard himself to Liberate your hands when you watch movies.
2. Powerful External --- iPhone charger case built-in 4200mAh Li-polymer battery can effectively provide more than a full charge for your iPhone 6 plus/6S plus/7 plus, high efficiency and high conversion rate. **Please Note: The battery case can't work with your iPhone 7 Lightning Headphone, but work with your iPhone 7 Plus/8 Plus BT Earphons** 3. Four Lights How Exactly Power Left --- With the smart battery case on, when you click the bottom, there are 4 lights to show exactly how much charge you have left. 4. Featuring sync-through technology --- You can sync your iPhone to a computer without having to take the battery case off. Simultaneously charge your iPhone and charger case together with the Lightning Cable ,This iPhone 7 plus battery case works with original APPLE light port , sync and transfer can be worked at the same time without moving battery case. It is compatible with all iOS versions including updates and Apple Pay etc. 5. BIGFOX Warranty --- If you are not satisfied with our iPhone 8 Plus/7 plus battery case or service, Please contact with us and you will be offered a full refund or replacement, Enjoy your shopping!