This kind of remote controller-dc rf remote controller kit with timer (S1D-DC12 & C-1), which operates in the 315/433 MHz frequency and is actuated by DC 6V, 9V, 12V and 24V. There is an adjustable resistor being installed in it. Working time of this remote controller can be adjustable between 2-40 seconds by using a screwdriver to twist the top of resistor. It can be applied to controlling lights, motors, fans, electrically operated doors/ locks/ windows/blinds/ cars or other appliances with voltage AC 110~240V or DC 0-28V. We recommend this kind of remote controller-dc rf remote controller kit with timer (S1D-DC12 & C-1), which operates in the 315/433 MHz frequency and is actuated by DC 6V, 9V, 12V and 24V. There is an adjustable resistor being installed in it. Working time of this remote controller can be adjustable between 2-40 seconds by using a screwdriver to twist the top of resistor. It can be applied to controlling lights, motors, fans, electrically operated doors/ locks/ windows/blinds/ cars or other appliances with voltage AC 110~240V or DC 0-28V. Press button to turn on lamp, after 2~40 seconds delay time (It depends on the position of R1): Turn off lamp by itself. Turn R1 clockwise with screwdriver, prolong the delay time. Press button to turn on lamp and prolong delay time more than 4 seconds... Turn R1 anti-clockwise with screwdriver, and shorten the delay time. Press button to turn on lamp and shorten the delay time. item link: http://www.ourautomation.com/-p-146.html