Exposed ballast design is compact and runs cool! Hard Core? offers superior cooling capabilities while extending the longevity of the capacitor and ignitor. Dual universal lamp cord receptacle is compatible with all Sun System? brand reflectors as well as other branded reflectors. Our Hard Core? ballast with dual input voltage easily switches from 120 to 240 volt power! Simply unplug detachable 8 foot 120 volt power cord (included), turn power plate around for 240 volt power and plug in a 240 volt power cord. (240 volt power cord sold separately, Part #903082). Powder-coated steel housing with louvered venting and solid design helps protect internal components. Rubber feet reduce noise & vibration. Excellent ballast quality with high temp 150?C wire connections will provide years of trouble-free operation. Removable stainless steel handles allow easy handling.