... one small and exquisite appearance.2) 2.5" LCD display, and show camera image 1-channel video input, ... can test the line is good or not.5) Auto-identify NTSC, PAL.6) Support RS232 and RS485, ... power supply and 2*1400MAH lithium batteries.11) Auto-reduce power dissipation, to extend the service life. ... input, one channel video outputVideo signal formatNTSC/PAL, auto-identityVideo output mode1.0±0.2Vp-p ,75Ω ...