1.Size:17",19",32",40" 2.Screen ratio:5:4 3.Resolution: ... Format:PAL/NTSC ModelDMA/SMD17LDMA/SMD19LDMA/SMD32LDMA/SMD40LPanel17'' LCD-TFT 19'' LCD-TFT 32'' LCD-TFT 40'' LCD-TFT Screen ratio5:416:916:916:9Contrast450:1600:1800:11300 ... standardQuality ControlISO9001,3C,CE,UL,FCC,FDA Good Quality 17inches TFT-LCD rfid cctv monitor