SpecificationsVoltage: (A) 220V/50Hz ± 10%, (B) 110V/60Hz ± 10%Power: 370WMaximum pressure: 17kpaAirflow amount: 70m/hMaximum vacuum: -9.8kpaMaximum noise intensity: -60dbDimensions: 35 x 20 x 35cmAdvantagesIt has the advantages of:Lowest noiseSmall sizeVery strong vacuum power.Very easy to carryOperate and clean.How to clean and change the dust collector bag?Power off, open the front cover, push down the spring board above the dust collector bag, take off the bag, you can easily clean it or change it.How to change the carbon-brush?1. Power off2. Open the back cover, take off the clectric motor from the electrical control box, open the front door as well, take off the air filter (8) (screw fixation), take off two screws of the motor fixation shelf (9), put out the electric motor (5) and electric motor fixation shelf (9) together.3. Put out the cable from the carbon-brush shelf (4) located upper of two sides of electric motor, pls use a very sharp item to push the plug, screw off two screws from the carbon-brush shelf, replace it with a new one (Note: change two carbon-brushes at one time).4. After change the carbbon brush, clean the air filter (8) with a dry brush, you'd better to blow it with dry air from air compressir, then re-set the counter located the back of electrical control box, let it to record the working hours from Zero.Note:1. Clean the dust-collector bag everyday2. Change the bag every two weeks3. Change the carbon-brush every 400hours and change the air filter.4. Before you use the dust collector, please remember to take off 4 pieces optional multi-direction castor and dust exhaust, these items are inside the front door of dust collector.