Hot plates feature 25 degree to 550 degree C (77 degree to 1022 degree F) temperature range, pyro Ceram top and special insulation to keep heat on top. Microprocessor-controlled for fast, consistent heating. Hot top indicator light blinks to warn that top is too hot to touch (>140 degree F) even If unit is off. These hot plates feature a low-profile, two-piece, cast design that deflects spills away from electronics and includes a built-in support rod mount. Digital display for heat on catalog NOS. 438-10001 and 438-10004. UL- and ce-approved. 2-Year warranty. 120V, 60Hz.