SIM Card Slot : Nano SIM Card Voice assistant built-in : YES Bluetooth-compatible Version : 5.0 Wi-fi : YES Metrics measured : Heart Rate Monitor,Blood Oxygen Monitor,Sleep Monitor,Blood Pressure Monitor Activity Tracked : Steps Tracker,Distance Tracker,Calorie Tracker,Activity Tracker Touch Screen : YES Category : Smart Watches Screen Material : TFT CPU Model : SP9832E Band Detachable : Yes APP Download Available : Yes Battery Detachable : No CPU Manufacturer : MediaTek Resolution : 320*386 Display Size : 2.03 inch Movement Type : Electronic Style : SPORT Application Age Group : Adult Screen Shape : Square Case Material : Alloy 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 : 8MP RAM : 4GB ROM : 64GB System : Android OS Type : On Wrist Compatibility : All Compatible Language : English,Russian,Spanish,Polish,Portuguese,Turkish,ITALIAN,French,German,Korean,Japanese,Hebrew,Dutch,Arabic,Indonesian Function : Passometer,fitness tracker,sleep tracker,Message Reminder,Call Reminder,Answer Call,Dial Call,Remote Control,Push Message,Tourbillon,24 hour instruction,Chronograph,Alarm Clock,World Time,Permanent Calendar,Power Reserve,week,Month,Heart Rate Tracker,Interactive Music,Calendar,Countdown,Calculators Certification : CE