This Product is compatible with Android as well as as I-phone.
IP67 waterproof. S2 can be worn to swim. (depth not over 1m, time not over 30mins) Sports and Health: sports tracking (Pedometer, distance,calorie) sleep tracking (sleeping time, sleeping quality) set fitness goals movement pattern (Swimming mode, Bicycle-riding mode, Running mode, Rope skipping, Sit-ups, Jumping jacks). GPS movement Trajectory, distance, Time, Pace, Calorie, Historical records, track sharing. Real-time dynamic heart rate monitoring. Alert & Notification function: call reminder (Android, iOS), contact name display; Facebook, Twitter, Line, SKYPE, WhatsApp (Android, iOS), content display; Sedentary; Anti-lost warning; Clock alarm; Task alert. Smart buttons Find phone: Camera remote, Music remote, Video remote. Wake up screen by turn wrist Built-in 90mah Lithium-ion polymer rechargeable battery,can be used about 10 days. Compatible with Android 4.3 and above, IOS 7.0 and above, with Bluetooth 4.0 Phone.