SIM Card Slot : Nano sim card Voice assistant built-in : no Bluetooth-compatible Version : NONE Wi-fi : YES Metrics measured : Other Activity Tracked : Steps Tracker,Distance Tracker,Calorie Tracker Touch Screen : YES Category : Smart Watches Screen Material : IPS CPU Model : 9820E Band Detachable : Yes APP Download Available : Yes Battery Detachable : Yes CPU Manufacturer : MediaTek Resolution : HD Touch Screen Display Size : 1.4' Touch Screen Movement Type : Electronic Style : Fashion Application Age Group : Child Screen Shape : Square Case Material : Carbon Fibre 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 : 512mb ROM : 4GB System : Android OS Type : On Wrist Compatibility : All Compatible Language : English,Russian,Spanish,Polish,Portuguese,Turkish,French,German,Hebrew,Arabic,Indonesian Function : Passometer,sleep tracker,Message Reminder,Call Reminder,Answer Call,Dial Call,Remote Control,Push Message,24 hour instruction,Alarm Clock,Small Second,World Time,Permanent Calendar,Power Reserve,week,Month,Noctilucent,Calendar,Calculators,SOS,Answer Call,Dial Call,GPS Tracker Watch Additional Features : 2G,3G,4G,Alarm,GPS,People,Sound Recorder Battery : 650mAh Bulit-in Battery Frequency 2G,3G,4G : GSM850\900\1800\1900MHz&TDD-LTE1900/2300/2600 GPS : MT6625L LBS : MT6625L,LBS Accuracy 50-1000m ,L1, 1575.42MHZ C/A code Wifi/GPS : Accuracy 5-50m OS : Android 6.0 G-sensor : Support