LCD Vision Chart Projector Optical Testing Monitor for Eye Acuity Testing in Optical Shops 21.5 inch screen, frame with narrow edge drawing process, ultra-thin and ultra-light design; * 178° ultra-wide angle PLS LCD panel; * 30% increase in transmittance, more clear; * Pixel matching visual standard is matched to the full pixel unit, and half pixel burrs are completely eliminated; * 0.6s response time, brings smooth control experience. Panel type 21.5 inch HD PLS Panel Resoluation 1920*1080 The maximum Brightness 320cd/m2 Working distance 1m-6.5m adjstable(Step distance 0.1m) Installation method Table type/wall mounted Basic visual markers C/E/letters/numbers/children visual markers/ETDRS visual markers Functional visual standard Red green/astigmatism/binocular balance/fusion, a total off 15 kinds Dimensions weight(wall mounted) Main machine: 575mm(W)*135mm(H)*400mm(D) / 2.2KG Remote control: 55mm(W)*186mm(H)*17.2mm(D)/80G Power parametters Input 100V-240V, 50-60Hz, Output DC 12V 48W