Tripp Lite's WWBASE-BK WorkWise™ Standing Desk Base lets you change the height of your workspace at the touch of a button. The DC linear actuator motor lifts or lowers a desk top at a speed of 1.5 inches per second. Base height adjusts from 23.5 to 49 inches in precise 0.1-inch increments for standing and sitting positions perfectly customized for your comfort. The included control handset mounts beneath a desk top and connects to the motor. It features buttons for up/down movement and a digital readout that displays height in inches. You can create up to four convenient preset positions, making it easy to instantly adjust the WWBASE-BK to the perfect height for you, as well as the officemate who shares your workspace. You can also set upper and lower limits if you prefer a narrower range of heights. The WWBASE-BK is made of steel with a black powder-coated finish. You can adjust its width between 42.5 and 72 inches to accommodate a variety of desk tops (sold separately). It perfectly matches the threaded mounting inserts on Tripp Lite WorkWise Desk Tops, including WWTOP48-BK, WWTOP48-ES, WWTOP60-BKC, WWTOP60-ESC, WWTOP60-WHC, WWTOP72-BK and WWTOP72-ES. Pre-installed leveling feet keep it stable on uneven floors. Includes a 10-foot power cord with two-prong plug that connects to a 120V AC outlet. Meets ANSI/BIFMA X5.5-2014 standards. Maximum load capacity of 365 pounds. Assembles in less than 30 minutes.