1.Capacity: 4000mAh ( LI-Polymer)                                                           
2.Input: 5V DC 1A                                                                                       
3.Output: 5V DC 1A                                                                                      
4.Case Material: plastic                                                                                  
5.Color: black, white ....                                                                    
6.Dimension:112*73*16mm                                                          
7.Charge Tip: micro USB
8.Discharge Tip: USB                                                                                   
9.Button: The output voltage and capacity checking indicated through the same button , click the button and start working.
10.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.  4)With flashlight, press the button 3 seconds the flashlight on(off).