Weight[g] : 35 SIM Card Slot : Nano sim card Voice assistant built-in : no Bluetooth-compatible Version : 4.0 Wi-fi : YES Metrics measured : Other Activity Tracked : Steps Tracker,Distance Tracker,Activity Tracker Touch Screen : YES Category : Smart Watches App name : Setracker/Setracker2 Screen Material : IPS Band Detachable : Yes APP Download Available : Yes Battery Detachable : Yes CPU Manufacturer : MediaTek Resolution : 240*280 pixels Display Size : 1.69 inch IPS color touch screen Movement Type : Electronic Style : SPORT Screen Shape : Square Case Material : Precious Metals Band Material : Silica gel Waterproof Grade : Life Waterproof SIM Card Available : Yes Mechanism : Yes Multiple Dials : Yes GPS : Yes Network Mode : 4G Battery Capacity : >450mAh Rear Camera : 1.3MP RAM : 1GB ROM : 8GB System : Android Wear,Android OS Type : On Wrist Compatibility : All Compatible Language : English,Russian,Spanish,Polish,Portuguese,Turkish,ITALIAN,French,German,Korean,Japanese,Ukrainian,Hebrew,Dutch,Arabic,Indonesian Function : Passometer,fitness tracker,sleep tracker,Message Reminder,Call Reminder,Answer Call,Dial Call,Remote Control,Push Message,Big Three Needles,24 hour instruction,Chronograph,Alarm Clock,Small Second,World Time,Permanent Calendar,Power Reserve,week,Month,Noctilucent,Calendar,Lighting Certification : CE,RoHS Battery : Built-in 710mAh polymer battery Supported Operate System : android 2.3 or above, IOS5.0 or above Languages support : Simplified Chinese,English,Russian GPS singal : L1,1575.42MHz C/A Positioning : GPS+Beidou+WIFI+LBS multi-mode positioning Camera : Supported MIC : Supported Waterproof : IP67 waterproof SOS button : Support Whatsapp : Supported