Colour: Black Size: 257.6×35.7×12.2mm(W*H*L) Weight: 38g Button: 1Pcs Wristband type: Removable wrist strap Wristband width: 22mm Wristband material: Silicone Adjustable wrist strap length: 130～220mm Shell Material: Glass Display type TFT-LCD Screen Size: 1.4″/3.5cm Resolution Of Screen Colors: 16-bit PPI: 323 Screen Luminance: 600nit Cover Glass Surface: Anti-Fingerprint Touchscreen Type: Single Point Accelerometer: 3-Axis Accelerometer：MC3632 Heart Rate Sensor: GH3011 Charging Type: USB Magnetic charging Theoretical Charging Time: <2 Hour Theoretical Working Time: 12 days Battery Capacity: 315mAh（type) Sport Functions: Outdoor Walking Indoor Walking Outdoor Running Indoor Running Outdoor Cycling Dynamic Cycling Hiking Cricket Yoga Rowing Strength Training Basketball Elliptical Machine Free Training & 90 Sports Modes ( OTA available soon by update realme Link) Health Monitor 24-hour heart rate monitoring, sleep monitoring, blood oxygen, sedentary reminder, water reminder, high heart rate reminder, low heart rate reminder. Other Features Music Control, Camera Control, Find Phone, Meditation, Stopwatch, Clock, Weather Forecast, Date Display, OTA Upgrade, Call Notification, Message Reminder, Alarm Reminder, Step Goal Completion Reminder, Low Battery Reminder, Brightness Adjustment, Shake Adjustment, Wear Monitoring, Lift Wrist to Wake Screen, Power Saving Mode, Do-not-disturb Mode. Vibration motor: Rotor Vibration Motor Water Resistance Rating: IP68(1.5m) Water Resistance Rating Operating Temperature: 0~ 45℃ Bluetooth: Bluetooth 5.0 APP: realme link System Support: Android 5.0+