Portable Infrared Therapy Device, LED Red Light Therapy Lamp Wide Use for Pain Relief Specification: Item Type: Portable Infrared Therapy Device Battery: 1pc Lithium Battery (Not Include Battery) Battery Model: Application Description: 1-1: Phototherapy effect through method of physics, it emits 630nm, 660nm and 850nm light wavebands (in the same waveband as He-Ne , deep penetration, red light penetrates human body and red light waveband The optical effect of light (after red color) increases the influence of light on mitochondrial catalase activity, enhances cell metabolism and protein synthesis, promotes local blood circulation, and controls increase in Material: Stainless Steel Package List: 1 x Physiotherapy Device 1 x USB Line 1 x Lanyard 1 x English Manual Note: 850NM is to naked eye