Air Purifier UV LIGHT ultraviolet for hvac dual lamp duct . 120v uv-c dual light for a/c duct. This is a powerful uvc unit that are rated for Air systems 1-5 tons PROUDLY MADE IN USA Installation is very easy 15 min, just cut two 1.75 inch holes in your duct slip the lamp inside and attach the self drilling screws (included in box), then simply plug it in with the 10 ft cord included Dimensions in Duct: 8" Power 120Volts 50/60Hz 6 ft power cord with 120v plug. fit any regular electric outlet