... convenient for use. Theory of cool light teeth whitening beauty equipment The newest technology cool light Teeth Whitening System can ... convert electric energy into strong blue light. The cool blue light activates the dental whitening gel and oxidizes the ... /60Hz7. Output power: 12V DC, 2.2A8. Whats included: Cool Light System, Main Poles, Transformer , Machine Base Instruction Manual, Mouthguard ...