Features Quickly and effectively solves the low power problem of your devices while on-the-go Supports over-current, over-voltage, over-charge, over-discharge and short circuit protection, safe to use Supports to charge two digital devices at the same time Universal USB port fits for most digital devices Has a solid dull polish construction, safe to use Compact size & lightweight for ease of use. General Specs 　 Compatibility- iPhone, iPad, Samsung devices, Cell phones, tablet PCs and other digital devices Capacity -4200mAh Connector- 2 x USB2.0 output, 1 x Micro USB input Package Details Weight: 210.16 g Size: 15.5*10.5*4.5 cm