Main features Screen Display type AMOLED Screen resolution 390 x 450 pixels Touch screen Yes Screen diagonal 4.45 cm (1.75" ) Pixel Density 341 ppi Color Display Yes Rounded Display Corners Yes Design Watch Case Size 42 mm Watch Case Color Black Watch Case Material Aluminum Strap Color Rose Strap Material Silicone Shape Rectangular Wrist Size 119 - 88 mm Maximum Strap Length 11.9 cm Closure Type Single Buckle Water Resistance Yes Water Resistance 5 ATM Features Built-in Microphone Yes Built-in Speaker No Built-in Camera No FM Radio No Supported Mobile Operating Systems Android 10,Android 10.0,Android 7.0,Android 7.1,Android 7.1.2,Android 8.0,Android 9.0,iOS 12,iOS 13,iOS 14.5 Features Blood oxygen sensor Yes Accelerometer Yes Gyroscope Yes Ambient light sensor Yes Caller identification Yes Clock mode 12 h / 24 h Intelligent notifications Yes Atmospheric pressure sensor Yes Geomagnetic sensor Yes Network Mobile network connection.