Hard start kit for 90-130V systems. Perfect for those RV 110 and 120 volt a/c units. Use on refrigerator and freezers. This start assist uses just 2 wires which connect either in parallel with the original run capacitor, or directly to the compressor. For use with 1/8 to 1hp compressors. Capacitor rated at 88-106. No wiring changes necessary. Same as Supco SPP4E.