PBM Light™ is a therapeutic PhotoBioModulation device that delivers red and infrared light therapy to any part of the body (identical to cold laser LLLT treatment). This deeply-penetrating light delivers therapeutic energy at the cellular level which enhances ATP production. ATP, adenosine triphosphate, is the ""energy currency"" your body needs to repair, rejuvenate and function optimally. PBM Light™ triggers a cascade of cellular activity, energizing cells resulting in: Promotes increased blood circulation, lymphatic drainage Helps reduce inflammation and arthritic pain Relieves TMJ and TMD (jaw and facial) pain Promotes tissue regeneration in muscles, oral tissue, dermal tissue, ligaments and nerves Energizes fatigued muscles Shortens healing time from sports injuries Prompts tissue and deep-wound healing Soothes chronic muscle, joint pain (shoulders, neck, back, wrists, hands, knees) Increases collagen production and skin radiance PBM Light™ is lightweight (4.4 oz), compact (12 cm x 2.6 cm) and is USB rechargeable. Also included in the kit is a zippered carrying case containing one USB charger, two rechargeable batteries and protective eye wear. Non-Latex Shelf Life : 36,500 days