Beam's Serenity IQA Power Unit Central Vacuum System from Electrolux Central Vacuum Systems includes an electronic user information system. A liquid-crystal display provides real-time information regarding the unit's efficiency, dirt level, time, temperature and service information.  It delivers 640 airwatts of cleaning power. Additional features include a mold prevention agent and electric power brush. (515) 832-4620 / www.beamvac.com