Aggressive Appearance:
Ultra Slim Portable design, Brushed aluminum shell, electroplating buttons, laser engraving LOGO. 4000mah's unique look that will let you stand out from the crowd.

Widely Compatible:
All dual USB output ports are universal and compatible with almost any smart device with an input of DC 5V, eg. smartphones, 5V tablets, PSP, bluetooth speakers & headphones, Google Glass, and MP3 / MP4 players.

Efficiency: 70%
Battery: Grade A+++
Capacity: 3000/4000mAh
Battery Type: High quality polymer lithium batteries
Input: Micro USB 5V 1A
Output: USB 5V 1A
Net Weight: apx.142g
Dimension: 114.5*62*11.6mm
Color: Silver & grey & Blue&black&Red or custom