Unger Stingray System - Cleans windows 255 faster and uses up to 395 less chemicals than traditonal methods. Enclosed spray nozzle prevents overspraying minimises waste and airbourne chemicals. Superior cleaning power: Lint free, easy glide microfiber Tri-Pad, collects dust, fingerprints, grease and other light dirt. Push button simplicity - effortlessly apply glass cleaner at the push of a botton at any height. Working height 4m (13ft).