JLF building intercom Carrefour, Carrefour visual villa host JLF22-6B, the northern supply center - Liu Xuan-ming 1391,1379,647 JLF22-6B technical parameters: Camera: 1/3 "CCD camera camera Operating Current: 230mA ± 20mA Frequency: 15625Hz 50Hz Frequency response: 300 ~ 3400Hz ± 3db Operating temperature: -40 ℃ ~ +50 ℃ Installation size: 140X75X30MM Installation: iron gate installation or wall embedded features: waterproof, cold, anti-shock, feel good touch. well, never card key, life of up to one million times. infrared CCD camera and LED fill light at night so the night can clearly show the images. can be increased with the built-in sensor head and the reader controller, IC card authorization induction unlock