This Fitness Tracker works good on me I can use it with or without connecting to my phone to track my steps, heart rate, Kcal, mmHg, SpO2, distance and I can use it for stop watch. I liked the color red looks neat to me and the size looks good on my small wrist. If you want to adjust the time you really need to connect it to your phone download the app Wearfit (the first version) the Wearfit 2.0 not gonna work on it. There is more feature in the app like GPS run tracking, Fatigue detector, alarm clock, etc. The battery life of this fitness tracker is good, it doesn't get hot and its waterproof. 

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Fitness tracker link here