【4CH 1080P Capacitive Touch Button Monitor】More advanced 3D noise reduction technology makes the picture more restored, as well as the WDR processing technology won't make the picture overexposure or too dark, making it more clearer and natural. Germany hi-tech on capacitive touch button sensor, less the possiblity of water-in, more durable and smoothly as well as extend the service life.Multiple camera compatible. Two camera is included, and this system can take up to four cameras. 【Extra Long Range Stable Operation Signal】AHD tech with extra long distance picture transmission, high rate and anti-interference. In the actual usage, refer to CM1 system, it wont happened delay within 100m/328ft after our testing on the open area.