Audio Intercom Door Phone Home Intercom System AC or DC

Specifications of Audio Intercom Door Phone Home Intercom System AC or DC : Voltage: 220V AC or DC6V(8x AA battery) (4 in each handset) not include the battery Output sensitivity: <60mV / frequency 1000Hz Frequency response: ±3dB(300Hz-3400Hz) Noise voltage: <10mV Ring sound level: >70dB(AT 0.5m) Quiescent current: <5uA Intercom working current: <100mA Color: white Talk time: unlimited, free calls Power Source: Battery or AC Power Range of application: Family, School, Restaurant, Office and so on Excellent consumer side of the tone circuit, intercom voice clarity   Directions for use Plug into 220V AC power. Or insert 4 cells of R6P SIZE AA1.5V (alkaline) into the cabinet of either one of the talkback pair. When you want to have a talk with the other, press down the push button and bell of his or her set will ring no matter whether you take up you handset or not . While talking, please speak into the microphone. When the talk is over, put back the handset, see it that the pilot light is off, or else the talkback set is still in working condition and continue to consume electric power. Our talkbacks are convenient to connect by means of twin conductor in common use, while connecting please pay attention to the color of the two different conductors. The ring sounds level can be selected. Categories: Doorbells, Electronic Accessories, Home Appliance & Accessories, Home Telephone accessories