Safe and Efficient 24 Volt Operation 5 Controllable Energy Saving Power Settings Detachable Controller with Waterproof Union Safety Float Switch 0-10v Input for 3rd Party Controller Integrated Memory Two different pause/feed modes that will shut off the pump for either 15 or 60 minute intervals. Super Quiet Operation True Slow Startup Submersible or External Applications Comes with intake screen and plumbing attachments The Reef Octopus VarioS Circulation pump features a detachable controller with mount, high quality ceramic shaft with propeller bearing to reduce wear and tear and the latest variable speed flow technology for refined control, enhanced performance, energy-efficiency and safer operations. Unlike the vast majority of circulation pumps which uses alternating current (AC), the VarioS pump boasts several key advantages over traditional AC pumps like greater energy efficiency and safer low voltage operation and produce less heat per volume of flow. >>> Now the aquarist can have full control of the water flow through their sump, reactors, filters or closed loop systems!!! VARIOS 2 WATER PUMP SPECS Output thread size: 1in slip PVC Inlet union size: 1in slip PVC Outlet Barb Size: 1/2-3/4in Stepped Dimensions: 4.75in(W) x 5.7in(L) x 4in(H) Voltage: DC 24V Power Consumption: 25w watts at max power Max flow: 792gph* Max Head Height: 13ft* *results will vary depending on aquarium setup