1. Quartz glass refers to without ; use incandescent lamp or special capacitor to connect to 220 V / 50 Hz or 120/60 Hz main voltage line without ballast; switch up to 20,000 times 2. It destroys the structure of viruses, and other microorganisms, loses its ability to reproduce, and then kills viruses, and other microorganisms. 3. Ultraviolet UVC can kill most and other microorganisms in air and water in a few seconds. Ultraviolet lamps can be particularly valuable in killing viruses that are difficult to kill with conventional chemical methods, such as chlorination. 4. Application: Suitable for small applications such as air purifiers, microwave ovens, refrigerators, sterilizers, humidifiers, dental instruments, washing machines, etc. So on and so forth. Type: / No Voltage: 10 volts Power: 3 W Pipe voltage: 9.5-13 V UV radiation density 254nm 30 cm, more than 30 cm2 Service life: 9000 hours Color: Silver + transparent Material: quartz + alloy Size: Length: 56 mm Diameter: 16 mm Package Contents: 4 * UVC Bulb Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.