Specifications:
Model: M4
Battery: 4 x 18650 li-ion battery (Battery not included)
Input: DC 5V-1A
Output: DC 5.1V-1A  DC5.1V-2A
Net Weight: 95g / 3.35oz
Size: 100 × 84 × 27mm / 3.9 × 3.3 ×1.06in
Color: Black/White

Main Features:
- DIY Power Bank and Charger
Custom capacity by 4 x 18650 li-ion battery to make your own power bank, portable external supply, provides your devices enough power.
- Dual Outputs
Dual outputs, can charge phones, pads or other small electronic devices simultaneously.
- Independent Circuit
Independent battery, charging and discharging at the same time, can work together and not influence each other.
- LCD Display Screen
Each battery independently clearly displays subtitle, easy to read the remaining capacity.
- Reverse Polarity Protection
When it comes to the reverse polarity, the chip inside will automatically identify and cut off the power of the reversed polarity circuit, displays an empty battery level.Reversed polarity will not affect the normal operation of other circuits.

Package included:
1 x Charging case(Battery not included)
1 x Android data cable    
1 x Introduction