1.Capacity:4000mAh ( LI-ION   18650*2)                                                           
2.Input: 5V DC 1A                                                                                       
3.Output: 5V DC 1A                                                                                      
4.Case Material: plastic                                                                                  
5.Color: white                                                                      
6.Dimension:91*50*25mm                                                                                                                                            7.Button: The output voltage and capacity checking indicated through the same button. Click the button and start working.
8.Indicator: 1)4 LED to indicate the capacity(25%/50%/75%/100%); 2)The LED flashing when charging, when fully the LED stop to flashing ; 3)LED lights off completely discharged.
9.Charge Tip: micro USB
10.Discharge Tip: USB
11.Protection: Overcurrent, Overvoltage, Overtemperature, Short circuit, protection.