... cost enjoy a good reputation worldwide.This model is extremely applicable to dental clinic.Characteristics:1. Fast and easy whitening ... a time.Specification:1. Wavelength: 420nm-490nm2. Light resource: SEMA LED 3. Emission time: 1m, 2m, 3m, 5m, 8m, ... DC, 2.2A8. What’s included: SEMA Cool Light System, Main Poles, Transformer , Instruction Manual, Mouthguard. XH-E504 whitening system for dental unit