... whitening beauty equipment with fast and safe treatment use the most advanced cool light technology convenient for us Theory of cool ... . Specification:1. Wavelength: 410nm-520nm2. Light resource: 6pcs large power LED light tube3. Emission time: 1m, 2m, 3m, 5m, 8m, 10m ... Instruction Manual, Mouthguard, electronic cord9. Silver and white color available LED Teeth Whitening Lamp for SPA and Beauty Salon