JLF building intercom Carrefour, Carrefour visual extension HKM18-19 North to supply center - Liu Xuan-ming 1391,1379,647 technical parameters: LCD Size: 7 "TFT Resolution: 800 × 480 Operating voltage: DC18.5 ± 0.5V Ambient Temperature : -40 ~ +55 ° C Standby Power: 0.36W Maximum power consumption: 13W audio output without distortion power:> 5mW Frequency response: 300 ~ 3400Hz ± 3db bottom knob: sound, brightness, color Dimensions: 245 × 150 × 25 (mm) Installation: embedded wall \ wall mount Features: 7-inch TFT color LCD display, interface friendly, easy to operate with the door host, wall unit, management unit each of the other users of the indoor unit of the same model two-way call, video intercom with video intercom, unlock, networking polyphonic doorbell, monitoring, surveillance and other door and Hyun features 16 classic sound choice for using picture-plug wire interface, user-friendly demolition using advanced micro-processor, integrated high, the system is stable, more reliable