High-strength metal body, strong and durableSmart watch is equipped with a 1.39-inch 360*360HD touch screen, which clearly displays the time and all-day activity data. The smart watch body is made of polycarbonate, fiberglass and zinc alloy. It has strong dustproof, anti-drop and impact resistance. Cold-resistant up to -40C, heat-resistant up to 70C. Bluetooth callMen's smart watch has speaker and microphone, supports Bluetooth for answering / Making calls, playing music and voice assistant, which can be realized by connecting mobile phone Bluetooth and "FitCloudPro" APP. Easily cope with various scenarios such as work, driving, sports, etc., free your hands anytime and anywhere and make communication more efficient. Health Monitor and Sleep TrackerSmart Watch can automatically track your heart rate for 24 hours . Blood pressure, blood oxygen, calories burned and more. Intelligently map and analyze body data to remind you to rest or exercise properly. Besides, the smart watch can help you monitor your sleep. Longer battery life and 1 year quality guarantee Built-in 400mAh battery, ultra-low power management, can last up to 7-15 days can be used and offers a long backup time of 30 days. The smart watch supports Android 4.4, iOS 8.0 or above and above and Bluetooth 5.0 devices.