Mismartband4 Bluetooth is Bluetooth 5.0 technology. According to relevant information, Xiaomi has announced the launch of its latest MiSmartBand4 in the UK. Although the price is low, there are still many functions. MiSmartBand4 adds 77 different themes to make its appearance more personalized. Moreover, it also uses Bluetooth 5.0 technology, which can better connect to your mobile phone and display its notifications, messages, phone calls, weather, fitness statistics and other information. If you wear it all night, fitness statistics will be collected through a 6-axis gyroscope, including steps, distance and sleep data. Moreover, the sensor of MiSmartBand4 is super waterproof, so you don't have to remove it even if you swim.