Waterproof grade:IP68 Screen:1.28 inch Pedometer:Yes Calorie counter:Yes Heart rate:YesParameter: *GOODIX5515 Main Chip *Tempered glass+IPS HD TFT 1.3 inches 240*240 DPI *Pure cobalt lithium battery more→230 mAh with 7-10 days of use, 30 days of standby *IP67 Waterproof, *Bluetooth 5.1 (low power consumption) Main Features: Medical grade ECG measurement, Automatic infrared blood oxygen measurement, Sleep apnea monitoring (snoring monitoring), HRV Lorentz scatter diagram, Accurate Scientific sleep monitoring, Breathing training, Heart rate monitoring, 10 Multi-sport modes, Female menstruation and ovulation reminder, Body temperature measurement, Exercise measurement (step/calorie/distance),