Item Type: Portable Infrared Therapy DeviceBuilt In Battery: Lithium Battery 2000mAHSize: Approx. 11.8 x 2.5cm/4.6 x 0.98inNote: 850NM is concealedto the naked eyeApplication 1-1: Light physical therapy effect through the method of physics, it emits 630nm, 660nm and 850nm light bands (in the same band as the He-Ne laser, deep penetration, red light penetrates the human body and The optical effect of the red light band (after the red color) increases the influence of light on mitochondrial catalase activity, enhances cell metabolism and protein synthesis, promotes local blood circulation, and controls the increase in infection. .wang-edit-text{ font-family:'Arial' important; } .wang-edit-text table { border-top: 1px solid 000; border-left: 1px solid 000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid 000; border-right: 1px solid 000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; } 1More Concentrated Energy: Strong penetration ability, suitable for physiotherapy in small areas and concentrated areas. 2Light Weight: Small size, easy to store and carry, can be easily put in your bag, suitable for travel. 3Near Infrared Light: Can penetrate deep into the skin: directly reach the pain point, so as to relieve pain more effectively. 4Shorten Treatment Time: Infrared light therapy pain device is equipped with a 30 degree optical glass lens, which can increase irradiance of 120mW/cm at a distance of 1 inch, thereby improving efficacy of infrared light therapy. 5Wide Range Of Applications: Very helpful for leg joint pain, back, shoulder, finger, knee, foot and neck pain.