SKMEI Mens All Black Military Style Smart Watch Functions Activity Tracker Features: Compatible with both iOS & Android system: Support bluetooth 4.0, Android 4.3 and above/ iOS 7.0 and above Call Reminder & APP Push: related icon will flick and buzzer will sound to remind you when there is a notification push of incoming call, message, variou social contact APP 50M waterproof, no need to take it off while swimming(Please note no button operation underwater)Built in superior CR2032 battery,super long endurance (Battery is replaceable) Unique deisng with fashion and style, for sports and business Exquisite gift for men and women Remote camera function EL backlight Application: go for a walk, basketball, mountaineering, swimming, running, travelling, etc Specification: Brand: SKMEI Movement: Smart movement Band Material: Silicone Case Material: PC Mirror: High transparent resin mirror Clasp: Stainless steel Case Size: 49mm x 49mm x 15mm Wrist: 140mm(min) ~ 240mm(max) Battery: built inCR2032205mAh, can last for 5-9 months, battery can be replaced when used up Waterproof: 50M Features: Time, Week, Date, Pedometer, Calorie, Aims, Data, Call Reminder, App Remind, Sleep Monitor, Distance, Bluetooth, 50M waterproof, Remote Camera, Low Battery Indication. Language: Connect app to change your watch language based on phone languagePackage Includes 1 x Smart Watch