You just plug in your iD battery and press start. The iD charger handles all the settings and quickly gives you an optimized charge every time. The new 4s capable EZ-Peak Live Dual multi chemistry charger comes equipped with built-in Bluetooth to work with the new EZ-Peak Live™ app for iOS and Android. The app gives you detailed information and advanced operation through a high-definition color interface. EZ-Peak Live Dual is the most powerful, versatile, and technologically advanced charger in the popular EZ-Peak iD lineup.