1.supports the NTSC/PAL video output; 2.support 4 cameras at the same time display; 3.supports synchronous audio recording and video recording function; 4.supports taking pictures function now and mirror function 5.support system information displayed on the screen (OSD) function; 6.support 32G mini SD high-speed card; 7.support real time clock display; 8.CMOS image sensor; 9.support can be set to any time mobile video detection function; 10.support circular coverage function; 11.support the single screen video can also record audio; 12.7 inch 800*480 HD resolution LCD display