Radio Stereo Harness：with a 22-pin plug and ISO adapter, provides power to aftermarket systems but is not compatible with factory amplified systems. | Reliability and Safety: ISO radio harnesses are engineered to meet specific electrical standards, ensuring proper voltage, current, and signal transmission between the car stereo and the vehicle's electrical system. | Easy Use: Allow for using the existing factory wiring and connectors when installing an aftermarket radios, without cutting factory wiring, safety and stability. | Red ignition wire: Not for all vehicle models, but if OEM radio harness of your vehicle has no ignition wire, aftermarket stereo can not be turned off/on through OEM radio harness. | Packing List: 1 x ISO Radio Wiring Harness