... compatible 3.small, light, compatible 4.fast delivery time ophthalmic A/B scan #CAS-2000B: Main configuration:USB 2.0 compatible ... to take;Software based on windows 7/ windowsXP Technical specification:A-SCANB-SCANProbe: 10MHz, red internal fixable LEDProbe: 10MHz,Accuracy: 0 ... , Axial length, and its averageDISPLAY mode: B, B+B, B+A mode,IoL table calculation: Holladay, Hoffer-Q, SCDK, SRK-II ...