The Smart Power Tower is an executive style powerbank with a function button, working indicator light and built in intelligent over charge and discharge protection. The Smart Power Tower is suitable for charging mobile phones, MP3/4 players, digital cameras and portable gaming devices. The Tower’s aluminium finish is an ideal surface for laser engraving but spot colour printing options are also available. Smart Power Tower will charge-up most smartphones.;Battery Capacity: 3.7V/2200mAh/8.1WH;Input: 5V-750ma;Output: 5V-1000ma;*Please note: These product images are used for illustration purposes only and the colours of the final product may vary slightly.