Voice assistant built-in:No Bluetooth-compatible Version:5.0 Metrics measured:Heart Rate Monitor Activity Tracked:Steps Tracker,Calorie Tracker,Activity Tracker Category:Smart Watches Band Detachable:No Style:fashion Application Age Group:ADULT Screen Shape:SQUARE Case Material:ALLOY Band Material:Silica GEL Waterproof Grade:Life Waterproof SIM Card Available:No Mechanism:No Multiple Dials:Yes GPS:No Network Mode:None Battery Capacity:220-300mah Rear Camera:None RAM:Less than 128MB ROM:Less than 128MB System:None Type:On Wrist Compatibility:All Compatible Language:English,Russian,Spanish,Portuguese,French,German,Arabic Function:Passometer,fitness tracker,sleep tracker,Message Reminder,Call Reminder,REMOTE CONTROL,Push Message,24 hour instruction,Alarm Clock,week,Month,Heart Rate Tracker,Noctilucent Color: black Material: plastic Type: A: black + orange two-color strap Package Contents: 1* 1*USB Cable Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.