The ADDS 4000/160 terminal is fully compatible with SCO, UNIX V.4, XENIX, PICK, Multiuser DOS and many other operating environments. The emulation set includes Wyse WY-60, WY-50/50+, DEC VT-320, VT-220 and VT-100, ADDS Viewpoint and PCTerm. The 4000/160 features selectable refresh rates up to 100Hz for clear, flicker-free viewing and an ISO 9241.3-compliant mode to reduce operator eyestrain. Bezel-to-bezel overscan is also available in up to 82Hz. Designed to deliver the lowest cost of ownership in its class, the 4000/160 also features EPA ENERGY STAR compliant power management to conserve power, high reliability to virtually eliminate downtime, extended warranties to reduce maintenance and support costs and user-friendly features to increase efficiency and productivity. This model comes with an RS-422 connection, and you can also add on an Ethernet adapter (not included).