... monitor 1,DC12V OUT jack 2,Antenna port ,3,BNC IN jack, 4,USB 5pins DC in jack 3.5 INCH wireless portable ... 2.5 hrs continuous operation LCD CCTV monitor Picture Advantage:1) Good service and ... if Weiguan Maintain Dept. identifies it was damaged with intention. Wireless 3.5 inch Portable 2.5 hrs continuous operation cctv test monitor