Led teeth whitening light for home use 1.Fixed Voltage:DC6V(CR2025 3V*2) Light Intensity: ≥600mcd LED colour:blue ( Not contain batteries ) Wavelength:460~470nM Continuous use:48 hours 2. Used together with other whitening items to becomes whitening kit or bleaching system. 3. This light adopt light treatment technology, combined with carbamide peroxide gel or hydrogen peroxide gel. 4. Rapidly remove surface stains and penetrate deep to remove embedded stains. 5. Designed for home use. 6. Easy to operate, convenient for use. 7. Speed up whitening course