Keep all hot foods at optimum serving temperatures longer. Glo-Ray prefocused heat patterns direct heat from a metal sheathed element, bathing the entire holding surface. Strong continuous housings eliminate sagging. Toggle switch. FYI: optional sneeze guard must be ordered with warmer, cannot be added later. 120V; must be field wired. UL, NSF, CSA. Warranty: 2 Years Heating Element. Ships from WI.