SRU1615 Portable Curing Systems The SRU-1615 is the nation's number one selling infrared curing machine. With 1,500 watts of power and available in 120 or 240 volts, this portable unit comes with a heavy-duty stand and casters. Its stand adjusts to 6' tall. The SRU-1615 is dependable, versatile and unbelievably affordable. Maybe that's why over one million "Speed-Rays" have been sold. The SRU-3215 is the same great unit as the SRU-1615 except it has two heads instead of one. This doubles the amount of coverage to 24 square feet! These units are suitable for use with all automotive-type finishes. Ideal for small spot repair and curing body filler. UL Listed The most economical infrared heaters on the market Heavy-duty construction can stand up to the punishing conditions in any body shop.