This a 1 1/2 HP, 220V Oneida woodworking shop dust collector. The cyclone action captures the large shavings and a woven filter captures the fine dust. Oneida no longer makes this model. It is similar to the Oneida V-System 1500 except the filter is internal rather than external. I bought it in 2001 for a small shop. I have since moved into a much larger space and I am upgrading to a 3HP Oneida.