quad monitor: 1.9 inches Digital Quad Monitor 2.Single, dual, triplex, quad, trefoil, Y- ... split image and PIP functions quad monitor features:9 inches Digital Quad MonitorPicture image may be adjusted for Horizontal, Vertical ... USB, you can control the computer through the touch screen9 inches Digital Quad Monitor MO-146D 1. Dimension:9”TFT-LCD ...