Feature: 1. Small shape and flexible, suitable for precise small area irradiation. 2. 630-660 wavelength, deep penetration up to 10-30mm. 3. Support arbitrary energy regulation, designed with memory function. 4. Timing function: timing 15/30/45 minutes, meeting different needs. 5. No UV, USB interface, adjustable brightness, stepless brightness adjustment. Specification: Condition: Item Type: Light Material: ABS Input Voltage/Current: 5V/2A Power: 3-5W Size: Approx. 78 x 45 x 11mm / 3.1 x 1.8 x 0.4in Principle Effect: 1. light effect: by the method of physics 600-700 nm light band deep penetration, with a red light through the optical effect of the human body and red bands red light on mitochondria increased the influence of hydrogen peroxide enzyme activity, enhance cell metabolism and protein synthesis, promote local blood circulation, control . 2. hot compress effect: the machine will emit a lot of heat in the process of use, reaches the temperature of 40-60℃ according to their own adaptability, use the heat, hot compress to the skin and body parts needed, promote blood circulation, with red light to achieve physiotherapy effect. Keep a certain distance to the skin while using generally no more than 30CM. Package List: 1 x Host 1 x Manual Note: Tuberculosis, local tumor, cardiac insufficiency, hemorrhagic disease, cardiac organ carrier, porphyria, pregnant woman's lower abdomen, allergic to red light. Please follow the doctor's advice before use, when many people use, should pay attention to prevent the occurrence of cross .