Screen: 1.4 inches to 1.69 inches. Screen resolution: 240*240 to 240*280. Battery: 170 mAh to 190 mAh. Water resistance: IPX7 to IP67. New feature: Rotating button for watch operation. More memory and improved user interface. COLMI P8 Plus features: Sports: All-day activity tracking, IP67 water resistance, 8 exercise modes, stopwatch, sports data report. Health: 24/7 heart rate, blood pressure, blood oxygen, sleep tracking and stages, reminders to move, menstrual cycle tracking. Life: Smartphone notifications, alarm, weather, shutter, music control, over 100 watch faces (supports custom watch faces). With up to 7 days of battery life, stay inspired day and night. Compatible with Android 4.4 or higher, or iOS 9.0 or higher.