Main chipset: Goodix GR5515Secondary chipset: JieLi AC6963AHR sencor: HS3300G-sencor: SC7A20Screen: 1.69 inchScreen resolution: 240*280 resolution.Battery Capatcity: 200mAhBattery life: 3~7daysWaterproof level: IP67 WaterproofAPP: Da FitSuitable for mobile phones with Android 4.4 or higher, or iOS 9.0 or higher.P8 Max FunctionsHealth: 24/7 Heart Rate monitor, Blood Pressure, Blood Oxygen, Sleep tracker, Breathe, Drink water reminder, Reminder to move, Women's menstrual period reminder, Support health APP.Life: Bluetooth Answer Call, Bluetooth Dial Call, Messages Reminder, Alarm clock, Weather, Music remote, Camera remote, Flashlight, Find phone, Dynamic watch face, watch face market (100+ watch faces), custom watch faces(you can set the picture you like as the watch face), Set the screen off time, Do not disturb mode.Sports: All-Day Activity Tracking( Steps, calories, distance ), IP67 waterproof, 7 Exercise Modes, Stopwatch, Sports Data Report.With a battery life up to 3~7 days, keep the inspiration coming day and night.