Weight[g] : 39 SIM Card Slot : Nano sim card slot Voice assistant built-in : no Bluetooth-compatible Version : NONE Wi-fi : YES Metrics measured : Other Activity Tracked : Steps Tracker Touch Screen : YES Category : Smart Watches App name : Setracker/Setracker2 Screen Material : LCD Band Detachable : Yes APP Download Available : Yes Battery Detachable : Yes CPU Manufacturer : MediaTek Resolution : 240*280pixel Display Size : 1.4' Screen Movement Type : Electronic Style : SPORT Screen Shape : Square Case Material : Rubber Band Material : Silica gel Waterproof Grade : Professional Waterproof SIM Card Available : Yes Mechanism : Yes Multiple Dials : Yes GPS : Yes Network Mode : 4G Battery Capacity : >450mAh Rear Camera : 1.3MP RAM : 512mb ROM : 512mb System : Android Wear Type : On Wrist Compatibility : All Compatible Language : English,Russian,Spanish,Polish,Portuguese,Turkish,ITALIAN,French,German,Ukrainian,Dutch,Arabic,Indonesian 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,Lighting,Countdown Certification : CE 4G watch Battery : 680mAh Lithium-ion polymer battery 3.7V GPS : L1,1575.42MHz C/A Camera : Yes Frequency 2G,3G,4G : GSM850\900\1800\1900MHz&TDD-LTE1900/2300/2600 APP installed : it can be installed the android apps as a smart cell phone Additional Features : 2G,3G,4G,Alarm,GPS,People,Sound Recorder