Clean and sanitize without chemicals. Removes rust, scale and dirt from most surfaces. Excellent for removing adhesive tape from glass, decals from student lockers. A “must” item for cleaning and sanitizing wheel-chairs in nursing homes. The DE 4002 never runs out of steam with Karcher’s “fill on the fly” system. No waiting for steam after running out of fresh water like most competitive models. Visible or audible alert warnings for low water, low steam chamber, descaling, and temperature. Variable steam and volume adjustment control knobs. Machine stores and transports in an upright position with tools on-board.