Kenroy Home 33028BS is a portable lamp with a 3-way switch that can be used with a 120V, 60HZ, 150-watt maximum medium base type "A" 3-way bulb. The lamp has a polarized plug for safety, and it should not be used with an extension cord unless the plug can be fully inserted. To clean the lamp, use a soft, dry cloth. Do not use any cleaners with chemicals, solvents, or harsh abrasives.