Quantity: one set Holder included: This package also includes a holder for the bulb, so you don't need to search for a holder for a pair of bulbs separately, which makes you saves time. Get an eye mask: The red light therapy lamp comes with an eye mask to protect your eyes from infrared rays. Upgraded infrared lights: a total of 18 high power LEDs per therapy bulb. 9 deep red LEDs 660nm + 9 near infrared LEDs 850nm. Infrared therapy can improve blood flow and circulation to the targeted area. Optical lens design: The red light therapy is equipped with a 30 degree glass lens and a additional oversized optical lens to improve irradiance u0026gt; 153.7mW/cm2. Infrared light can be focused on body parts, the effect is more obvious. Widely Used: Infrared light therapy can be used on any part of the body. Suit it for general skin tone/beauty, wounds, sunburn, joint pain, wrinkle prevention and more. Red light therapy promotes recovery of damaged muscles and tissues. EASY TO USE AND SAFE: Infrared heating lamps comply with standard E26/E27 sockets, 100~240V AC, easy to install and use. High power LED light therapy bulbs have built-in qualified heat sinks for better heat dissipation and safety. Suggest: Use distance: It is suitable for use at a distance of 5-60cm from the human body, and can directly contact the skin. Use time: the use time is 5-20 minutes, with the increase of the use distance, the use time should be relatively extended. However, it is recommended that a single use of the same piece should not exceed a maximum of 20 minutes. Different slots can be reused. Frequency of use: Continue to use 1-3 times daily until symptoms improve. After Maintenance and Consolidation: Use 3-4 times per week. If this product is used on the face, wear an eye patch to protect the eyes. When using other parts, avoid looking directly at the light source for a long time. Note: Bulb holder delivery specifications are different and converters must be used.