Device is gently used and works great. I no longer have acne breakouts and am hoping to sell to someone who needs it. Bag is included Discover your clearest skin possible without harsh chemicals or a multistep routine. Treat mild to moderate acne, calm existing breakouts and restore your skin’s healthy appearance. What Is LightStim? LightStim delivers light energy in a similar way plants absorb light energy from the sun. Each LightStim device uses different wavelengths, or colors of light. LightStim for Acne uses blue light to destroy acne-causing bacteria, and red light to help soothe and calm the skin. This helps clear existing breakouts in order to give you visibly improved, healthy-looking skin.