Analog Timer Power Center One center manages lights, filters...everything! Constant power or day/night cycling, both in one device Reliable analog design is easy to program. Healthy habitat control you can set and forget Replace the tangle of wires and timers behind a reptile terrarium with a single safe power strip featuring built in control. Spin the handy dial to set on/off times for four plug-in devices, while simultaneously powering four devices that run constantly. Ideal for cycling lights and heaters to replicate the natural day/night sequence that promotes reptile health. The precise analog control is adjustable to 15-minute intervals. This ruggedly built, UL listed device is backed by a 12-month warranty.