HTC ONE M8 3200mAh White Portable Detachable External Rechargeable Battery Power Bank Pack Backup Battery Charger Case with Viewing Stand Full Matte Protective Rechargeable Basttery Case Built in 3200mAh Capacity, input: Input: 5V/500mA, Output: 5V/800mA Easy Access to all Functions, controls, speakers and cameras Works as both an extended battery set and a protection case On/Off Switch for easy control, Ultra Slim & Sleek design. Color: Black