This Dinner Bell Thumper box is built for fisherman by fisherman. Includes box, thumper, 2 remotes and plug in. All stainless fasteners, no welding involved, Adjustable tempo thru speed controller. Marine PVC coated power cord with waterproof NPT cables that will keep water out and relieve strain on connectors. Supplied with 12 volt accessory plug with LED indicator as standard but can be supplied with clamps at no charge. One pound hammer that gives great sound. Portable, Easy to use and IT WORKS. This unit attracts fish.