JLF building intercom Carrefour, Carrefour visual villa host JLF22-08, the northern supply center - Liu Xuan-ming 1391,1379,647 JLF22-08 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: 145X110X35 (mm) Installation: wall gates installed or embedded features: waterproof, cold, anti-shock, feel Good. good contact, 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. sensor head can be increased with the built-in card reader and controller, IC card authorization Induction unlock