PAC's SWI-ADAPT input adapter lets you connect a PAC steering wheel control adapter (sold separately) or any other PAC wiring interface equipped with a 3.5mm connector to a car stereo with a two-wire resistive steering wheel input connection. The SWI-ADAPT eliminates the need to cut or otherwise alter the SWC adapter's output plug and preserves the integrity of the adapter's wiring, when installing car stereos from Panasonic, Android, Soundstream, Boss, Planet Audio, Pumpkin, or other brands.