1More concenated energy, song peneation ability, suitable for physiotherapy of small area and concenated area. 2Nearinfrared light can peneate deep into the skin and directly reach the pain point, thereby more effectively alleviating the pain. It is very helpful for leg joint pain, back, shoulder, finger, knee, foot, and neck pain. 3The outer bulb shell is made of 303 stainless steel, sturdy and wearresistant, firm and durable for use. 4The infrared light therapy device for pain is equipped with a 30degree optical glass lens, which can increase the irradiance of 120mW/cm at a distance of 1 inch, thereby improving the therapeutic effect of infrared light therapy and shortening eatment time. 5Light weight and in small size, easy to store and carry, can be easily put into your bag, perfect for avel use. Condition: NewItem Type: Red Light Therapy DeviceMaterial: Stainless SteelTwo Power Supply Methods: (delivered without battery)1. Can put the battery directly: lithium batteryBattery model: 186502. You can put three AAA batteries into the battery box, and then plug them into the host for use.eatment Course: Usually two to three times a day, 15-30 minutes each time, the light should be directed at the wound as much as possible, the closer the distance is, the better, and the time is over one to four days.Application Light physical therapy effect-----through the method of physics, it emits 630nm, 660nm and 850nm light wavebands (in the same waveband as the He-Ne laser, deep peneation, red light peneates the human body and the red light waveband optical effect (after the red color), the effect of light on the activity of mitochondrial catalase increases, enhances cell metabolism and protein synthesis, promotes local blood circulation, and conols the increase in infection. 1 x Red Light Therapy Device1 x Battery Box1 x Manual