Tired of having to switch on and off of your fish tank lighting on a daily basis? This mechanical timer is the solution. simply set the timer what time of the day to switch on. Or you can set any interval you want or simply set it on the whole day. Remember, in case of power outage. Set the timer at current time in which the power is restored. *Ideal for Indoor Power Applications - great for slow cookers, lighting, fish tanks and more *24 Hour Mechanical Timer - with 15 minute segments *Simple to Use - simply press the pin when you want your device to turn on