To make it simple simply leave the cable connected to the battery and attach the other end to the bike somewhere convenient, when you want to download, you plug your controller. Leaving this cable to the stationary bike, you can also bridge for different needs through a second cable provided with terminals.The control unit is equipped with two LEDs that indicate when it is charging and when it reaches the highest position then in stand-by mode. In addition to being a very useful and indispensable tool allows you to take your battery a lot longer, then the cost is amortized on the first battery replaced. Note: the picture shows model with US plug. Clearly that the sale has common Italian taken. The item \The seller is \This item can be shipped to the following countries: America, Europe, Asia, Australia.