The FB-3612-HB is designed for extreme environment conditions. The upper aluminum rustproof construction and its 1/8" acrylic lower dome is ideal in school, mall, etc. The FB-3612-HB offers an excellent camera protection for most indoor or outdoor applications. The upper dome is designed to prevent water droplets on the lower bubble and to insure quality video image all the time. The lower dome is secured with 8 tamperproof screws. The FB-3612-HB includes a mounting bracket which allows installation of "boxed" type camera with a maximum camera length of 11 inches. A dual camera bracket is also available in option that allows two CCD cameras to be mounted inside the dome (FB-3612-2-HB). This weatherproof and dustproof dome include a heater & blower. A 24VAC-100VA transformer is required to power the on board power supply. Two voltage outputs are available: 12VDC & 24VAC @ 3amps. The FB-3612-HB is easy to install and can be used for wall, ceiling, corner or pole mounted applications.