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The type of light source: light emitting diode - super light cooling semiconductor light sourceOutput wavelength: Blue light:Output energy: 120mwOutput power: 70w~100wRepetition rate: Continuous or 10Hz pulseHigh-intensity cold-light activates the Whitening Gel, a special whitening formula that contains hydrogen peroxide (H2O2) and 20 nanometer silicon dioxide (SiO2), along with several other special ingredients. tooth whitening Tooth Whitening Machine