Multifunctional Smart Watch with Wide CompatibilityThis fitness activity tracker has 10 sports modes, and the features of weather information, music&camera control, alarm clock, stop watch, sedentary reminder, find smartwatch, brightness adjustment, makes this sports watch activity tracker practical and comprehensive. The smart watch is compatible with Android and iOS systems, Android 4.0 or above, iOS 8.0 or above. See Calls & Messages on Your WristWith this smart watches, you will never miss any important calls & message during meetings or workout. When a call comes in, you can answer or hang up the call with your watch, and you can also make a call with your watch without a SIM card inserted. The smart bracelet watch can also receive call & SMS from Facebook,Twitter, Whatsapp, KakaoTalk, Wechat, QQ, Weibo, etc. Sleep Tracking and Heart Rate MonitorThe sleep monitor can detect and analyze the data of your sleep time and sleep depth , which can be viewed directly on the sleep monitor to help you improve your sleep quality. It can also monitor your heart rate in real time and you can view the data information on your phone, and you can also view the data you have measured every day since wearing the watch. All the data is to help you better understand and improve your health. Super Sound Quality: The voice of smartwatch cell phone is clear and loud. Listen to music and make calls from your watch Freely. When your watch is connected to a mobile phone, your watch can be a earphonet. When answering a phone call, watching TV, or watching videos, the sound will sound through the watch. Lifetime worry-free product guarantee which ensures long-lasting enjoyment of your smart watch.