The XS Trackball Keyboard (G84-5400) combines comfortable mouse control with compact dimensions Via the optical trackball with two mouse keys the cursor can be controlled easily and precisely Optical trackball with two mouse buttons for easy control of the cursorHigh degree of reliability and precise keystroke feel thanks to individual keys with Gold Crosspoint contacts (Cherry ML technology)Ideal for continuous usage due to the long operating life in excess of 20 million key confirmations per individual keyCompact dimensions and very low overall build height ideal for restricted spaces and for 19 inch applicationsStandardised measurements and installation dimensions of the complete XS product family - the keyboard can be adapted to every applicationLightweight - for applications where every gram countsPlug & Play - can be used with the operating system&39;s standard driversSupports Code Set 3 and UnifiedPOSFastening option for permanent installationDetachable pluggable feet for individually adjusting the tilt of the keyboardFreely programmable keys for even more time-saving operationKeyboardNumber of Keys  89Keyboard Layout  UKKeyboard Technology  ML technologyKeyboard & Pointing Device  TrackballCable length  25 mMouseMotion Sensing Technology  OpticalMouse Resolution  400 dpiInterfacesPortsInterface  1 x USBComplianceCertifications  Product approvals cURus c-tick • VCCI • CE • FCC • VDE • BSMIPhysicalForm Factor  KeyboardIn The Box  1 XS Trackball Keyboard • Operating instructions in hard copy • 2 Pluggable feetDimensions  374 cm (W) x 139 cm (D) x 20 cm (H) - Weight 067 kgColour  Black