4-IN-1 Handheld Red Light Device with Dynamic Muscle Stimulation (DMS) and RadioFrequency (RF). Includes Red, Blue, Purple and Green Light Therapy. 4 modes with 7 different power levels to get you the results you want. Red light therapy is a non-invasive treatment that uses red light to improve skin health, reduce inflammation, and promote collagen production. It has also been shown to have pain-relieving and healing benefits for conditions such as arthritis and muscle strain. Green light helps improve redness from skin conditions such as acne or rosacea. Blue light helps hyperpigmentation and help eliminate basal cells. DMS helps to tone + lift the underlying facial muscles that cause droopy eyes and saggy skin. RF helps to tighten the skin and stimulates natural collagen production paired with infrared heat to help the underlying connective tissues repair and regenerate naturally.