J-KEM Model 250J KEM Model 250 The Model 250 has both heating and cooling outlets for maximum versatility. Two heating outlets supply 1800 watts of power for large equipment and heating mantles up to 22L. The third outlet (1800 watts), normally used for cooling, is programmable to supply power below, above, or at the set point. Contains J KEMs patented power control computer which provides 0. 1 regulation of anything. Specifications: 120vac, 15 amps, 1800 watts