Powerful UV-C Light and Ozone Technology: Sanitize using short-wavelength ultraviolet light without any additional liquid or chemicals. Easy To Use: Charge via USB, then simply click the on/off button. When the indicator light turns blue, the sanitizer is ready to use. When fully charged, the sanitizer can be used 3-4 times Highly Efficient: Sanitizes hard to reach corners and spaces. Great for sterilizing hotel rooms, toothbrushes, air purifiers, humidifiers, and other small appliances. With timing function. One key to turn on, the indicator light will flash for 30 seconds to start disinfection, and it will automatically turn off after 30 minutes. Leave after lighting up the lamp , without worrying about working too long.（Note: Leave the disinfection area in time after lighting the bulb）