[Custom dial] The smart watch uses an unprecedented TFT-LCD 1.69" high-definition LCD touch screen, IPS technology, and a resolution of 280x240. 5-level brightness adjustment allows you to clearly and intuitively understand your exercise data. Set your personal photo self Define the watch face. You can quickly get news and information, easily check the weather, set timers, control smart home devices, and perform many other operations through voice commands^[24/7 monitoring of heart rate, sleep and blood oxygen] The fitness tracker is enhanced with high-performance motion sensor technology, which can accurately track your real-time heart rate 24/7, sleep quality (light, deep, awake, rapid eye movement mode), and monitor Blood oxygen (SpO2) level.^[14 sports modes and waterproof smart watches] Mens and womens fitness watches support 14 types of sports such as walking, running, cycling, yoga, fitness, swimming, etc., reminders of abnormal heart rate during exercise, and record all-day fitness data, including steps, distance, Calories burned, miles traveled using smartphone GPS. The 5ATM waterproof means that it can still be used up to 50 meters underwater. The high-grade oily coating on the screen allows you to get rid of fingerprints and water stains^[Smart Notification & Widely Compatible] After the smart watch is connected to the mobile phone via Bluetooth, it will vibrate to remind incoming calls, receive and read important text messages. Including Messenger, WhatsApp, Skype, Snapchat, Telegram, Calendar, WeChat, etc. Dirrelo smart watches are compatible with smartphones such as iPhone, Samsung, Galaxy, Xiaomi and Huawei. (Note: You cannot call or send text messages)^[Smart assistant & long-lasting battery] Smart watches have many smart functions, such as alarm clock, weather forecast, water reminder, sedentary reminder, stopwatch, timer, music control, mobile phone search, female menstrual cycle, built-in 8 native languages, low battery Reminders etc. The large 300mAh battery can be fully charged at one time (2 hours) to support 10 days of working time and 35 days of standby time.