• Bluetooth 5.3 / Phone Calls: The smart watch has a built-in high-performance speaker and a microphone, so you can make calls just by pairing it. No need to take your phone out while working out or working In addition, in case of emergencies, it can also be used for emergency communications. Adopting the latest generation of Bluetooth 5.3, the transmission range and connection stability have been greatly improved. Call quality is clear and comfortable, and the voice is clear and you can hear the recipient's voice • (1.9 inch Super Large Screen, Incoming Calls/Message Notifications) The smart watch uses a large 1.9 inch high resolution screen that provides a comfortable visual experience. You can display incoming calls, LINE, Twitter, Instagram, Facebook, and other messages from apps, so you can quickly check important notifications. The watch is touchscreen and feels great and the watch screen will automatically light up when you raise your arm, allowing you to see the time clearly even in the dark night • Activity Meter, 24-Hour Exercise & Health Tracking: The smart watch comes with a variety of exercise modes that are useful as an activity meter. You can freely choose between running, biking, swimming, tennis, etc., and record data such as calories burned, exercise tracking, distance and steps, so you can rationally manage your workout. Equipped with 3 specialty sensors to measure your exercise and health, you can record your health status in real time. Automatically records your sleep data at night and records your shallow sleep time and deep sleep durations to track your sleep quality every night • (Full of Practical Functions / Dial Editing) The smart watch has convenient functions such as an alarm clock, flashlight, pedometer, remote camera, music playback, voice assistant, weather forecast, stopwatch, sedentary alert, and so on, making your daily life easier. You can download various types of dials to change the dials in the dedicated app. You can also set your favorite photo on the dial • (Waterproof and Long Lasting Battery) This battery is waterproof for daily use, so you don't have to worry about washing your hands or getting sweaty when exercising, so it can be used in a wide range of situations. It is not completely waterproof, so please refrain from swimming, hot springs, bathing, etc. Built in long lasting battery that takes about 2.5 hours to fully charge and can be used continuously for 6 to 8 days. Varies depending on frequency of use. The band is 22mm standard width design, easy to replace the band on the market