Field-installed 3 hour timer kit for electric baseboard heater models K & CB. This timer connects to the heater to automatically limit ON time from 0 to 3 Hours. Flexible Hook Up, choose the side of the baseboard heater you want to install this timer on and wire it according to the manufacturer instructions. Designed for left or right mounting. Everything you need is included so you don’t have to order extra parts. It comes with the timer, knob & j-box cover.