Choose the LOCTITE CL40 LED Spot Curing Quad Controller to receive the unit itself, a Foot Switch, and an AC power cord. Combined with up to four LED Light Sources, you’ll have an instant on/off LED system that’s like four high-intensity spot lamps in one. Use the resistive color touchscreen to choose either continuous light output mode or an up to 7-step programmed output mode. The light output intensity and time can even be programmed separately for each LED head.