1. Compatible Operating System: Android, iOS - Apple 2. Water resistant (IP67) 3. 30-day standby power 4.Sleep-cycle smart alarm 5.Fitness monitor & sleep tracker 6.Unlock your Mi phone without a password, this multi-functional wristwatch tracks steps, distance, calories burned, hours slept, quality of sleep and awake time, in addition to displaying the time and date and functioning as a vibrating alarm clock. It is water-resistant and includes a case with a clip.