Weight[g] : 45 SIM Card Slot : Nano sim card slot Voice assistant built-in : no Bluetooth-compatible Version : NONE Metrics measured : Other Activity Tracked : Steps Tracker,Distance Tracker,Calorie Tracker Touch Screen : YES Category : Smart Watches App name : Setracker/Setracker2 Screen Material : IPS Band Detachable : Yes APP Download Available : Yes Battery Detachable : No Resolution : 240*284 Display Size : 1.81' Movement Type : Electronic Style : SPORT Screen Shape : Square Case Material : Rubber 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 : 256MB ROM : 256MB System : Android Wear,Android OS Type : On Wrist Compatibility : All Compatible Language : English,Russian,Spanish,Polish,Portuguese,Turkish,ITALIAN,French,German,Korean,Ukrainian Function : Passometer,sleep tracker,Message Reminder,Call Reminder,Answer Call,Dial Call,Remote Control,Push Message,Big Three Needles,24 hour instruction,Alarm Clock,Small Second,World Time,Permanent Calendar,Power Reserve,week,Month,Noctilucent,Calendar,Calculators Certification : CE,RoHS Battery : 1000mAh Lithium-ion battery 3.7V GPS : L1,1575.42MHz C/A Camera : Yes Frequency 2G,3G,4G : GSM B2/3/5/8;WCDMA B1/2/5/8;B1,2,3,5,7,8,20,38,39,40,41 Additional Features : 2G,3G,4G,Alarm,GPS,People,Sound Recorder SOS Call : Support Bluetooth : Support WI-FI location : Support Google Translate : Support Flashlight : Support Waterproof : IP67 Waterproof