The therapeutic apparatus produces photosynthesis, has strong energy, and strong penetrating power, and achieves biological effects. It can promote protein coagulation in diseased tissue in a short time and improve local blood circulation. Mitochondria in cells absorb red light the most. After red light irradiation, mitochondrial catalase activity increased, This can increase cell metabolism; increase glycogen content, increase protein synthesis, and increase the breakdown of adenosine triphosphate, thereby enhancing cell regeneration and promoting wound and ulcer healing; at the same time, it also increases the phagocytosis of white blood cells and improves the body's immune function. Helps heal skin, reduces inflammation, relieves pain, relieves knee joints, relieves rheumatoid arthritis, relieves pain from sports injuries and sprains, acupuncture for wound ulcers, and relieves pain from tissue damage. Feature: 1. 630nm 660nm and 850nm wavelength combination. Since red light does not penetrate deep into the skin, it is suitable for topical treatments such as reducing wrinkles. Near-infrared rays penetrate deep into the skin and directly reach the pain point for more effective pain relief. Therefore, it is very helpful for leg joint pain, back, shoulder, finger, knee, foot muscle pain, and cervical pain. 2. This treatment bulb has 3 high-power LED chips, 2 emit 630nm and 660nm deep red light, and 1 emits 850nm near-infrared light. Since near-infrared light is invisible light, half of the infrared light chips will not emit light when the red light therapy device is working. " 3. Portable and easy to use: A storage bag and lanyard are included, which can be used and carried anytime, anywhere. Simply place the red light therapy laser bulb over the target area. Mild pain 1 minute per day, average pain 2 to 3 times per day for 2 minutes per day, and deep pain 3 times per day for 3 minutes each. 4. Both humans and animals can use: Not only humans, but pet owners can also use our cold laser therapy device on animals because it works the same way to relieve animal PET, (dogs, cats) at home and outdoors joint pain. HOW TO USEPlace the device on the painful area, any distance from touching the skin to 1 inch from the skin, depending on the desired depth. Red light can penetrate up to 1 inch into your tissue or joints. Product StatementThis product cannot directly replace any medicine and is not used to diagnose, relieve, treat, cure or prevent any disease. Quality and SpecificationsNo cooling fan, no noise interference when enjoying light therapy, the service life is more than 50,000 hours Product parameters: Product weight 76g Input voltage: 3.7v Power: 9w Light quantity: 3PCS 3W (630W/660/850) led chip Material: aluminum alloy Timing function: 5 minutes automatic shutdown Battery: lithium battery Battery capacity: 4200mAh Package: 1* USB charger 1*red-light flashlight 1* Li-Ion battery Notes: 1. Due to different monitors, the picture may not match the actual color of the product. 2. Due to manual measurement, please allow an error of 1-3cm. 3. If there is any problem with the product, please leave a message before giving a bad review. Thank you for your understanding.