I found a smart watch bracelet and checked the model with Taobao.
There are too many smart bracelets. You can use the photos on Taobao to search for items and see what brand they are. Then let the merchant download an APP to use it. Taobao has this function. If you can't recognize it on Taobao, it is recommended to throw it away. The price is very cheap. Suitable for Huawei, oppo, Samsung, vivo, Sony's smart bracelet watch sports pedometer, the phone can be connected by turning on Bluetooth.