... keratometer function) is the best Refractometer in China. Auto Measurement, colorful screen! Auto Refractometer ARK-2000Features:· Three kinds of measurement model is ... each record 10 times, automatic display representative value· Intuitive interface, convenient adjustment, the VD value, the precision and print mode, etc· ... /60HZDimensions/weight288(W)*500(D)*480(H)mm/14kg Auto Refractometer ARK-2000