A manual thermostat, also known as an analog thermostat, is the old-school device used to maintain the temperature. These are the devices of the previous generation and are fading out quickly. A manual thermostat requires you to manually set up the desired temperature on the device by rotating a knob.
The advanced version of manual thermostats is a digital one. It requires you to manually set up the temperature using the up or down switch. The selected temperature is displayed on the screen in digital thermostats. Once the temperature is set, the device starts to heat up or cool down the place until the desired temperature is attained. A manual thermostat requires you to turn it on or off as per your needs every time you leave home.