This bracelet can only be connected to Apple phones. Turn on the Bluetooth of Apple mobile phone and connect it with the bracelet. App downloads KATE SPADE software and sets your own fitness goals, such as how many steps you take every day and how many hours you sleep. After the setting is completed, you can synchronize the bracelet information every time you click the APP. Mine is battery-powered. Personally, I think it consumes a lot of batteries.