Please do not shut down immediately after the measurement is finished. Wait until the backlight of the screen goes out, and then manually shut down or wait for the thermometer to shut down automatically; Please confirm whether the mobile phone Bluetooth is turned on for a long time. Try to restart the Bluetooth; Please confirm whether other Bluetooth devices are turned on. Avoid interference from other Bluetooth devices; Please confirm whether the smart basal thermometer battery is sufficient and the App is updated to the latest version. It is recommended to try to restart.