The theben-timer 27 is an analog weekly timer. Different switching times can be programmed at 2-hour intervals for each day of the week using the switching tabs. With one channel and 84 switching segments, the timer is often used for presence simulation, but is also used for shop window lighting and for switching off the workplace power supply at night. In this way, the mechanical timer can save energy costs and reduce CO2 emissions by switching off the connected loads on a time-controlled basis.