HTC One M7 Rechargeable Battery Case MUZE&reg; 3800mAh External Backup Power Bank Charger Case Cover Battery Extender Case Charging Case with Flip PU Leather Cover for Business Card/ID Card/Credit Cart Holder Slot & Built-in Media Kickstand for HTC ONE M7 Retail Package 1. External battery charger case for HTC ONE M7 2. Easy installation and removal 3. Ultra-thin design and perfect dimensions 4. 4 Led indicators for power balance (0--25%--50%--75%--100%) 5. Stand function support