UP2 by Jawbone Activity + Sleep Tracker, Black Diamond, Classic Flat Strap Easily track your activities and your sleep automatically Get personalized guidance from Smart Coach Smart Alarm silently wakes you at the optimal time in your sleep cycle Log your meals and use UP App Food Score to know if you are eating right Syncs wirelessly plus 10 days battery life Android compatibility - UP2, UP3 and UP4 are compatible with Android 4.3 (Jelly Bean) or later. iOS compatibility - UP2, UP3 and UP4 are compatible with the following iOS devices:iPhone 4S or newer, iPod Touch 5th generation or newer, iPad 3 or newer, iPad Mini 1st generation or newer, iPad Air 1st generation or newer