Radiant Under-desk heater by Q-Mark. An ideal, economical way to provide warmth for anyone who sits at a desk , counter or table whether at work or at home. The 200 series gives you personalized warmth just where it's needed- when it's needed. This amazing heater costs just one or two cents per hour to operate... depending on your local electricity rate. 202sl- 170 watts -1.5 amps 120 volt cord. size-15x22x1. thermostat available.