Solar-powered fan keeps cars parked in sun feeling cooler and more comfortable upon return * Needs only natural sunlight to work, no plugs or batteries * Blows hot air out built-in vent, while taking in cooler, fresher air from vehicle?s circulation ducts * Constructed with recycled plastic, the little fan is an earth-friendlier alternative to other models * Includes a flip-up window attachment and cut-to-size PVC gap moldings; requires no tools