Features: Skin-friendly Abs+Tpu comfortable wearing -Lightweight and compact, sweat-proof band, comfortable wear for a along while Digital movement provides accurate time. -Made from high transparent resin mirror, clear to see. Backlight function makes you see the time clearly even at night. 5Atm water-resistant (not for swimming, shower, diving). Protection from daily unconscious water scatter or unexpected rain drop. Really a good choice for outside activities BT Connectiong: Pedometer/Distance/ Calls Remind -Sports Statistics: To help users quantify the daily exercise goals, encourage and supervise their own exercise, adjust the best physical condition. -Call / Information Reminder: To avoid missing important incomming call or information when they arrive. Lower Power Consumption, Wide compatibility： Button Battery lasts for a year(depends on actual using situation), Smart APP for iPhone Samsung. How to use it: -Read user manual carefully Download, install App, Match them. APP for android 4.3, iOS8.0 or above Note: Item color may show slight aberration due to different shooting light and monitor display.