Band length[mm]: 215, Band width[mm]: 22 Weight[g]: 177, Voice assistant built-in: YES Bluetooth-compatible Version: 5.0, Wi-fi: no Metrics measured: Heart Rate Monitor,Blood Oxygen Monitor,Sleep Monitor Activity Tracked: Steps Tracker,Distance Tracker,Calorie Tracker,Activity Tracker Touch Screen: YES Category: Smart Watches App name: Infowear Screen Material: TFT CPU Model: Dialog14695 Band Detachable: Yes APP Download Available: No Battery Detachable: No Resolution: 360*360 Display Size: 1.32 Movement Type: Electronic Style: SPORT Screen Shape: Round Case Material: ALLOY Band Material: Silica GEL Waterproof Grade: Life Waterproof SIM Card Available: No Mechanism: Yes Multiple Dials: Yes GPS: Yes Network Mode: None Battery Capacity: 220-300mah Rear Camera: None RAM: 128MB ROM: 128MB System: None Type: On Wrist Compatibility: All Compatible Language: English Function: Passometer,fitness tracker,sleep tracker,Message Reminder,Call Reminder,Answer Call,Dial Call,REMOTE CONTROL,Push Message,24 hour instruction,Chronograph,Alarm Clock,Speed Measurement,Month,Heart Rate Tracker,Calendar,Countdown,Calculators Colour: Black Material: Silicone+Metal Package Contents: 1*Smart watch 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.