1. The powerful 3500mAh built-in lithium polymer battery can effectively provide 100% additional battery life to your iPhone 6 & 6s, 4.7 inch (Does not work for iPhone 6 & 6s Plus)
2. Compact and lightweight design protective case, protection for the iPhone 6 & 6s against daily wear and tear, scratches and scrapes
3. Featuring sync-through technology, you never need to remove the battery case to sync or charge your phone
4. Built-in LED battery level indicator, charge & sync through the case, and conveniently placed cutouts for all buttons and ports
5. Imported polymer batteries, 100% safe and reliable
6. Perfectly compatible with iOS 9.0, perfectly match iPhone 6 fast charging, charging faster and performance more stable
7. Flexible protection procedures, high security level, anti-overcharge, anti-short circuit and over-voltage protection 6-layer protection
8. With single micro SIM card slot, so that iPhone 6 & 6s achieve dual sim dual standby
9. With mobile phone function, support GSM 850/900/1800/1900MHz quad bands
10. Support Bluetooth V2.0, TF card
11. With a mirror back cover, 1.77 inch TFT screen and touch QWERTY keyboard
12. Standby 1000 hours, playing MP3 20 hours