SKG V7 PRO is a smart watch that is multifunctional and works with Alexa, with Androids and with iPhones - can be widely used for making and receiving calls, monitoring your health and exercise, provides you with the smart notification and 60+ sports modes, which is durable and pratical in your life, choose and use it everyday, it will never let you down. Does not come with a charger! I lost it. Only worn once before I got my Apple Watch! This watch does everything an Apple Watch does. Your Reliable Daily Assisstant ——Heart Rate Monitoring: To show the range of your heart beat, the average level and your resting heart rate level, whether it is in good condition or not the recent rate is stable or instable, and if the heart rate exceeds the nomal level, the watch will remind you with it. ——Noise Monitoring: To continuously analyze the sound intensity in your environment, it will be helpful to understand how long you\'re exposed to loud sounds because it will affect your hearing. ——Sleep Monitoring: To get you know the sleep duration at night, your heat rate, stressm respiratory quality while sleeping and give your a score about the sleep quality by analyze the deep and light sleep, the awake and rapid eye movements, also it offers the sleep assist in the app to help you sleep well. ——SpO2 Monitoring: To deliver the recent SpO2 varying range and let you know the blood oxygen saturation when you do exeercises or click the function on the smart watch.