Advanced sleep tracking automatically to capture REM, Light and Deep
Smart Alarm(TM) silently wakes you at the optimal time in your sleep cycle
Syncs wirelessly plus 7 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
