Best Gift for Family, Friends, Yourself: Fitness Tracker can be adjusted in length between the minimum 4.7 in and the maximum 8.3 in. The total weight of the Fitness Tracker is 0.82 oz. It is lightweight, skin-friendly, soft and waterproof IP68. It can follow your daily activities (work, sports, leisure, sleep), record your exercise and health monitoring. Suitable for men, women, elderly and children, it may be one of the most suitable gifts.Working Time: Smart Fitness Watch is the best partner at work, you can set it on the mobile APP Runmefit: up to 5 sets of alarms, you dont have to worry about being late for appointments or forgetting important things. You can set drinking Water 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 to the Tracker. Tracker can measure your calories, steps, distance. Tell 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 Tracker: 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 Fall Sleep, Deep Sleep, Light Sleep, REM Sleep. You can view daily, weekly, and monthly data in the APP "Runmefit" to help you better understand your health status and lead a healthy lifestyle.Fashionable and Diversified: Smart tracker can be matched with bands of different colors, and a variety of colors are available to make your smart tracker more like fashion accessories. Different colors can meet the different needs of different occasions. The silicone material of the tracker can protect and keep your arm safe, it is soft and comfortable to wear. (Alternative bands 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 waterproof rating of the watch reaches IP68. You can wear it while washing your hands, running in the rain and even swimming. This Fitness Tracker is compatible with iOS 8.0 above & Android 5.0 above smartphones(not for PC or Tablet).After-Sales Service: We have a professional technical team that answers most users' questions within 12 hours. Please purchase with confidence.