Knob on right controls gate valve. Has air control on top of the silencer. the thing that makes it look weird is the star shape adornment where it transitions to the cone. It has a 1200 DC pump with 8 level control and feed mode. Are not all the DC pumps made in the same factory in China? They all look exactly the same. Cool deal on Bulk Reef on Black Friday, only $169 for a highly rated DC cone skimmer that's rated for up to a 132 gallon tank. Should skim the hell out of a 40 breeder. The Eshopps PSK-75 is going. It is a pretty good skimmer but no cone, bubble plate, gate valve, etc. Gonna clean it up and put it on eBay.