The principle of semiconductor cooling suit is to achieve cooling through the Peltier effect, which transfers heat from one side of the device to the other through current. This technology utilizes semiconductor refrigeration chips to generate temperature differences in equipment through direct current, thereby achieving cooling or heating effects. The semiconductor cooler is equipped with a semiconductor cooler and a small electric fan, which can be turned on by connecting a regular power bank (12V or 7.4V, which is safe). Semiconductor blowing air conditioning has a very good tactile sensation and is very comfortable. Semiconductor cooler is a new technology with relatively high cost.