Powered by Demetron™ technology. Lightweight, ergonomic design, interchangeable light guides, whisper-quiet fan, multiple curing options, and periodic level shifting. Demi employs the power of Periodic Level Shifting, or PLS technology, shifting output intensity from 1,100 mW/cm2 to a peak of 1,330 mW/cm2 multiple times throughout the curing cycle with a wavelength of 450 to 470 nm. PLS drives cool, continuous high output for a true 5-second cure without generating excessive heat. Extended light guide. 3 year warranty. Complete Unit