24-hour Eletric Appliance Programmable Timer Control Safe and easy to use, Plug in your appliance to the timer and then the timer to the power supply socket and switch the socket on. Ensure timer is disconnected from power supply. The timer can be overridden by moving the red switch on the side. Press down the segment pushbuttons according to how long you require the system to stay on. Each segment is 15 minutes. Timer and your appliance go working till the stop time. Turn the timer dial until the black pointer is set to the present time.