1. Usually, there is a switch or button on the controller to turn it on or off.

2. The controller usually has a temperature adjustment button or knob to select the required temperature. The temperature can be adjusted to an appropriate level as required.

3. Some controllers may have a time adjustment button or knob to set the heating time. The heating time can be adjusted to an appropriate length as required.

4. Once the required temperature and time are set, the controller will start to heat the electric kang. You can wait for a while until the electric kang reaches the required temperature.