[Extending the Service Life of Components] The huge heat and pressure generated by the air conditioner during startup will seriously damage the important components of the air conditioner and compressor. 5-2-1 CSRU2 compressor saver can help the air conditioner and compressor bear the pressure and heat during startup, help the compressor start faster, reduce energy consumption, extend the service life of the compressor and related components of the air conditioning system [High Quality Material] 5-2-1 Hard start kit is made of high quality material, which is high quality, durable, and not easy to damage. [High Compatibility] The HVAC hard start kit has a wide range of applications and is compatible with major compressor manufacturers. It is applicable to of air conditioning compressors and most of the 3.5-5 ton units of AC . [Easy to Install] You only need to connect the three color wires of the AC hard start capacitor kit with the compressor, connect the black wire with the common side of the compressor, connect the color wire with the starting winding of the compressor, and connect the red wire with the running winding of the compressor. (Special note: For your personal and property safety, please contact a licensed technician to install the CSR-U2 compressor energy saver .) Colour:Photo Color Material:Metal Package Contents: 1X CSR-U3 compressor saver Kit Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.