Digital, built-in radiometer with 4-digit, LCD readout. Features 4 curing modes: Ramp mode is less stressful for certain restorations; Boost mode for high-output, 10-second cures; Bleach mode for high-output power bleaching; and Continuous mode. For those who prefer traditional curing, the unit can also cure in 10-, 20-, 30- and 40-second increments with a 10- or 20-second beep interval. Accepts all Demetron light guides.2-year warranty.