Importance of the wavelength of each color light: The blue light for acne relieving & deep cleansing, the red light would penetrate deep into your skin's dermis and deliver skin rejuvenating photons of light. And the orange light can improve dull-looking skin. Chemicals and UV Light Free- This device harnesses the power of proven technology to clear acne and allow the skin to heal itself. Easy and Effective Treatment - Suitable for all skin types, lightweight, safe and comfortable. Visible results in as little as 1 week with results improving over time. Unlimited Light Treatment Sessions - No activators needed, powered by USB port or portable battery power bank, you can use it as many treatments as you needed, no more extra costs. Auto Treatment Timer - The light device will shut off automatically at the end of each 10-minute treatment, unless stopped by the user. Goggles attached in for better protection of eyes from the lights.