... 25%,50%,75%,100% 7) Press the button for about two seconds to turn it on or off, ... So it is optional for users to charge their Iphone 4G or not. 8 ... connectorswe use female connector, so you only need one cable for charging and discharging, easy to take. 9) 8000mAh ... .10)Whole set including: Universal power x1pcs, Mini USB cable x1pcs, Connectors *6pcs( other is opptional) Product Size ...