4-in-1 uses 4 powerful, all-natural technologies to bring you a skin care tool all in one. This skin treatment stick allows you to use each mode individually or combine them to customize treatments, including anti-aging, skin tightening, etc., based on your skin care goals LED Light Therapy and Penetrating Wave Cell Stimulation - The first 2 modes include powerful red, blue and green LED lights. Light therapy is clinically proven to naturally help fight signs of aging (red), calm skin (blue), and improve skin tone (green). Ripple Penetration Technology is like a weekly workout for your skin, helping to lift and firm while maintaining skin moisture and significantly boosting collagen and elastin production Negative Ions and Massage Therapy - Third and fourth Luma modes include ion/galvanizing channels and massage. You can set Ionic (+) or Ionic (-) to remove dirt and impurities from the skin, or inject serums and creams deep into the skin, significantly improving their absorption and effectiveness. The massage mode has two settings and uses the power of vibrations to gently work the facial muscles, improving muscle tone in the cheeks, eyes and forehead. Handy Features - Includes enhancements to the LED display, allowing you to quickly create custom treatments. The premium rechargeable lithium battery allows you to recharge it so you can use it for free. The latest built-in timer function allows you to preset the duration of each treatment. It will automatically turn off once the timer is up, so you know you're done.