... .Specification:1. Wavelength: 420nm-490nm2. Light resource: SEMA LED 3. Emission time: 1m, 2m, 3m, 5m, 8m, 10m, 15m, 20m, 25m ... : 12V DC, 2.2A8. What’s included: SEMA Cool Light System, Main Poles, Transformer , Instruction Manual, Mouthguard. XH-E504 whitening ...