... toothcha Whitening systemExciting New Product: The Telescoping Whitening Accelerator is SEMA's newly design, which can be easily attached to the ... at a time.Specification:1. Wavelength: 420nm-490nm2. Light resource: SEMA LED 3. Emission time: 1m, 2m, 3m, 5m, 8m, ... /60Hz7. Output power: 12V DC, 2.2A8. What’s included: SEMA Cool Light System, Main Poles, Transformer , Instruction Manual, Mouthguard. XH ...