Heating band for Orion Dew Zapper Pro 4-Channel Dew Prevention System Sized to fit 150mm (6 inches) to 203mm (8 inches) telescopes Features 6 inches cable with right-angle connection for snug fit Made in the U.S.A. This Dew Zapper Heating Band for medium sized telescopes is part of the larger Dew Zapper Pro 4-Channel Dew Prevention System. The required control module is sold separately. With Dew Zapper Pro you'll never again have to quit an observing or imaging session because dew clouded up your optics. Orion's advanced dew prevention system powers up to four individual heating bands independently. So you can keep all of your optics — main telescope, finder scope, guide scope, eyepieces, or other optical accessories — bone dry in high humidity or dew-prone weather. Different sized heating bands are available to suit scopes up to 12 inches diameter. The Dew Zapper Pro control module is powered by a 12-volt field battery and comes with a car lighter-style DC plug on a 12 inches cable. The microprocessor-controlled circuitry delivers pulse-width modulation for stable, precise temperature control. Each of the four heater outputs has its own temperature control knob with a full range of adjustment from 0 percent to 100 percent, and each has a red LED power indicator. Set the output of each channel to provide just the right amount of heating for the prevailing conditions. The heating bands (sold separately) are highly power efficient, drawing only 0.25 amps (for 1.25 inches) to 2.5 amps (for the Large strip) at maximum output. A 10-amp fuse in the control module prevents any mishaps from electrical surges or reversed polarity. The Dew Zapper Pro's heating bands have right-angle cable connections to reduce cable strain and provide a tighter fit. Hook-and-loop fasteners hold the bands snugly around your instrument and accessories. Each heating band comes with a 6 inches-long cable that plugs into the control module via an RCA-type connector.