1. Yes, it has limited functions to use alone, and there are more functions to link mobile phones. If it is a step counting and heart rate measurement function, you don't need to bring your mobile phone. The bracelet will collect these data. After you connect the mobile phone, you will synchronize the data in the smart bracelet and view it in the mobile phone.

2. In the past, when some friends were running, they might run with a mobile phone, which is not very convenient. Now, when many friends are running, they run more with bracelets. Running with bracelets is much more convenient and will not be as heavy as mobile phones. Just when they don't bring mobile phones, the call reminder function won't work and they can't receive mobile phone calls.

3. The so-called smart Bracelet must be connected to the mobile phone to achieve most of its functions. The bracelet should have been an ornament, but it was only before smart technology opened its door. Now it is trying to record a series of relevant data such as the user's fitness effect, sleep quality, eating arrangement and habits, and can synchronize these data to the user's mobile terminal device. The terminal device may give relevant suggestions according to its "analysis function" to guide a healthy life through data. It can be said to be a high-grade pedometer, which has the functions of general pedometer and measuring distance, heat and fat. At the same time, it also has special functions such as sleep monitoring, high-grade waterproof, Bluetooth 4.0 data transmission, fatigue reminder and so on.