CPU Model : nRF 52840 Band Detachable : Yes APP Download Available : No Battery Detachable : No Resolution : 240*280 Display Size : 1.69'' TFT Touch Screen Movement Type : Electronic Style : SPORT Application Age Group : Adult Screen Shape : Square Case Material : Plastic Band Material : Other Waterproof Grade : Life Waterproof SIM Card Available : No Mechanism : No Multiple Dials : No GPS : No Network Mode : None Battery Capacity : 300-450mah Rear Camera : None RAM : <128MB ROM : <128MB System : None Type : On Wrist Compatibility : All Compatible Language : English,Russian,Spanish,Portuguese,ITALIAN,French,German,Korean,Japanese,Ukrainian,Arabic Function : Passometer,sleep tracker,Message Reminder,Call Reminder,Remote Control,Push Message,Chronograph,Alarm Clock,week,Month,Heart Rate Tracker,Interactive Music igin : Mainland China Certification : NONE