Fully Submersible Unit's Vortex Flow Design Exposes Water Longer to Ultraviolet Light, Glowing Monitor Halo Ring, Visible from any Angle Immediately Shows it's Working, Comes Complete with 9000 Hour, Long Life 10 Watt Lamp and Water Tight Quartz Sleeve, Includes Transformer and 18' Grounded Power Cord, Black Color is Unobtrusive Whether used In or Out of the Water, ¾" Barbed Fitting for Inlet and Outlet 1 YEAR LIMITED WARRANTY, Dimensions: 12-5⁄8" x 3¼" Watts: 10