use uv-c quartz glass tube, hight transmissivity of ultraviolet ray. special ultraviolet bulb, perfect bacterium killing. FEATURE:use uv-c quartz glass tube, hight transmissivity of ultraviolet ray. special ultraviolet bulb, perfect bacterium killing function. no chemical pollution to the environment. volt AC230/115Vfreq 50/60Hzuv light 11Wsize 310x110x135mm