Hign-Concerned Chemical:None Battery Life:3 Days Voice Assistant Built-In:No Bluetooth-Compatible Version:5.0 Metrics Measured:Heart Rate Monitor,Other,Blood Oxygen Monitor,Sleep Monitor,Blood Pressure Monitor,Body Temperature Monitor Activity Tracked:Other,Steps Tracker,Distance Tracker,Activity Tracker Category:Smart Watches Screen Material:Color Lcd Application Age Group:Child Screen Shape:Square Waterproof Grade:Life Waterproof Sim Card Available:Yes Mechanism:No Multiple Dials:Yes Gps:Yes Network Mode:4G Rear Camera:None Rom:512Mb System:Android Wear,Android Os,Ios,Harmonyos Type:On Wrist Compatibility:All Compatible Language:English Function:Passometer,Sleep Tracker,Message Reminder,Call Reminder,Answer Call,Dial Call,Remote Control,Push Message,Alarm Clock,Heart Rate Tracker,Thermometer Ram:128Mb Resolution:172*320 Display Size:1.47 Battery Capacity(Mah):300-450Mah Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-Minnanxin