Natural Ergonomic Keyboard 4000 has been expertly crafted to allow you to work in a more natural position. The new Gull Wing design features a 14-degree gable, a natural arc and a curved key bed - bringing the keys closer to your fingers to reduce reach and unnecessary motion, while encouraging a more natural typing position. It also comes equipped with an optional palm lift for a seven-degree reverse slope and a cushioned wrist rest that encourages better arm and wrist alignment. Device Type: Keyboard - ergonomic Interface: USB Layout: English - North America Hot Keys Function: Multimedia, programmable, zoom, e-mail Features: Palm rest, spillproof, zoom slider Microsoft Certification: Compatible with Windows 7 Manufacturer Warranty: 3 years warranty Device Type: Keyboard - ergonomic Interface: USB Hot Keys Function: Multimedia, programmable, zoom, e-mail Layout: English - North America Features: Palm rest, spillproof, zoom slider Connections: 1 x USB - 4 pin USB Type A Cables Included: 1 x USB cable Compatibility: MS Windows XP Media Center compatible Compliant Standards: UL, VCCI, BSMI, ISO 9001, GOST, cUL, ICES-003, ISO 14001, WHQL, CB, EMC, MIC, FCC, RoHS, WEEE, ACA, REACH, TUV T Compatible with Windows 7: Compatible with Windows 7 software and devices carry Microsoft’s assurance that these products have passed tests for compatibility and reliability with 32-bit and 64-bit Windows 7. Included Software: Microsoft IntelliType Pro OS Required: Microsoft Windows XP, Microsoft Windows 2000 SP4 or later, Microsoft Windows 7, Apple MacOS X 10.2.x - 10.4.x, Microsoft Windows Vista Service & Support: Limited warranty - 3 years Min Operating Temperature: 32 °F Max Operating Temperature: 95 °F Humidity Range Operating: 5 - 80% (non-condensing)