COLMIHealth Features: Wrist-based Heart Rate (automatic measurement), Blood oxygen, Blood Pressure, Sleep tracker, Drink water reminder, Reminder to move, Women's Physiological cycle, Zen mode, Support health APP.Voice Calling Features: Voice Calling, Dial Pad, Recent Call, Contact, Call Rejection, Voice Assistant.Life Features: Smart Notifications(Call, Text, Gmail and Smartphone App Notifications), Alarm clock, Game, Flashlight, Timer, Stopwatch, Weather, Controls Smartphone Music and Camera, Find My Phone and Watch, Calculator, Set the screen off time, Do not disturb mode.Sports Features: Activity Record( Steps, calories, distance), Sport Goal, 100+ Exercise Modes, Sports Data Report, IP68 waterproof.Watch FacesAPP Sync: 230+ watch facesSystem Default: 7Customize Watch Faces: Support, you can set the picture you like as the watch face.COLMI P71 Spec.Main chipset: Realtek RTL8763EDisplay size: 1.9 ''large TFT color display.Display Resolution: 240*285 pixelsBattery Capacity: 230 mAh Li-pol battery.Battery Life:Standby mode: Up to 20 daysTypical usage modes: Up to 10 daysHeavy usage modes: Up to 5 daysCoutinuous Voice Calling: Up to 280 minsCharging Time: About 1.5 hoursWaterproof level: IP68 WaterproofAPP: "pubu Wear"Suitable for mobile phones with Android 5.0 or higher, or iOS 9.0 or higher.LanguageEnglish, Portuguese, Arabic, Russian, Ukrainian, German, Japanese, Spanish, Italian, French, Greek, Dutch, Turkish, Polish, Romanian, Thai, Vietnamese, Indonesian, Hebrew, Bahasa Malaysia, Simplified Chinese.