Revolutionary U-40™ Ultracapacitor re-energizes to full power in under 40 seconds. Proprietary C.U.R.E.™ Technology delivers uniform depth of cure with one of the lowest temperatures in the industry. Don't change batteries, change curing lights. Call 800-KERR-123 or visit kerrdental.com/demiultra © 2015 Kerr Corporation. All trademarks are property of their respetive owners.http://www.kerrdental.com/demiultra