The 5-2-1 Compressor Saver Kit CSRU1 by CPS is designed for 1-2-3 ton air conditioning systems. It includes a hard start capacitor with relay, providing a reliable solution for starting the compressor smoothly. With a weight of only 0.8 ounces, this kit is compact and easy to install, ensuring efficient operation and maintenance of your AC system. The maximum operating voltage of 0.1V guarantees optimal performance, making it a dependable choice for your cooling needs.