First layer filter / paper bag (disposable): 4gallons (15L) effective collection and processing the visual dust the second layer of the filter / increased cloth filter (washable): to protect and extend the HEPA filter life. The third layer filter / motor protective sleeve: depth filtration to protect motor life. Fourth layer filter / HEPA or ULPA filters: HEPA can effectively filter 0.3um dust up to 99.99%, suitable for use in a more subtle filter. HEPA all after the detection of the laser particle counter. Apply to 100-300000 clean rooms, cleanroom, wafer processing, food processing industry, semiconductor processing, electronics factory, laboratory, 2 from the date of the product sold in the warranty period (18 months), warranty after a period of long-term technical support CRV and other cleaner distinction: 55 db noise: CRV-100 cleanroom vacuum cleaner noise 7-9 dB lower than the market. Price: CRV-100 is a one hundred workshops vacuum cleaner dust super prices account for a large advantage in the market. Sale: the motor in all cleanroom vacuum cleaner warranty oldest 18 months, which is not other brands. Voltage 220-240V 2.5 m vacuum hose power 1200W 1005mm telescopic rod length airflow of 96 cfm 42 L / sec 4 gallons (15 Litres) capacity inspiratory amount 99 "H2O 3200mm H2O L * W * H (403 * 403 * 636mm) size vacuum suction 22Kpa 10kg machine weight noise standards 55db (a) 10m power cord