Batteries are charged quickly and efficiently without ever over-charging, and pumps, motors, and fans operate perfectly for prolonged life. Additionaly, the DLS Series meets F.C.C. Class A and B Model criteria and features U.L. and C.U.L. Listing on all 12 volt units. Each DLS is Float and Quick Charge selectable and is compatible with Iota's optional control features, such as the IQ3 smart controller and VS-2 switch. Every DLS unit offers superior reliability and is backed by a two-year warranty.