【Best Gift for Family, Friends, Yourself】: The Fitness Tracker can be adjusted in length between a minimum of 4.7 inches and a maximum of 8.3 inches. The total weight of the Fitness Tracker is 0.82 oz. It is lightweight, skin-friendly, soft, and waterproof IP68. It can track your daily activities (work, sports, leisure, sleep), record your exercise, and monitor your health. Suitable for men, women, the elderly, and children, it can be one of the most suitable gifts.【Working Time】: The Smart Fitness Watch is the best partner at work; you can set it in the 'Runmefit' mobile app: up to 5 sets of alarms, so you don't have to worry about being late for meetings or forgetting important things. You can set water drinking reminders and sedentary reminders to establish a healthy way of working. And you can receive information reminders on the smart tracker.【Sports Time】: The activity tracker has 16 sports modes: walking, running, cycling, mountaineering, football, basketball, badminton, tennis, yoga, etc. You can set 4 of your favorite sports modes and save them on the tracker. The tracker can measure your calories, steps, and distance. It tells you the amount of exercise that day in the most direct way. You can also set your exercise volume; when you reach the set goal, the tracker will remind you 'goal completed'.【Heart Rate Monitor and Sleep Monitor】: The smart tracker can detect heart rate, blood pressure, blood oxygen, and body temperature in daily life. Monitor your sleep and analyze your sleep quality through falling asleep, deep sleep, light sleep, REM sleep. You can view daily, weekly, and monthly data in the \"Runmefit\" app to help you better understand your health status and live a healthy lifestyle.【Fashionable and Versatile】: The smart tracker can be matched with straps in different colors, and a variety of colors are available to make your smart tracker more like fashion accessories. Different colors can meet different needs on different occasions. The silicone material of the tracker can protect and keep your arm safe; it is soft and comfortable to wear. (Alternative straps for smart tracker: B0CMQBPHDD).【Standby and Waterproof IP68】: Charging time 2H, normal use 7-10 days. After receiving the smart tracker, please charge it first. Long press the smart tracker button to turn it on. The watch's waterproof rating reaches IP68. You can wear it when washing your hands, running in the rain, and even swimming. This Fitness Tracker is compatible with iOS 8.0 and above & Android 5.0 and above smartphones (not for PC or tablet).【Customer Service】: We have a professional technical team that answers most users' questions within 12 hours. Buy with confidence.