iPod/iPhone Dock Connector Input.3.5mm / 1/8'' Male Stereo Audio Output.Designed to filter out engine & component noise.Breaks Ground Loops to Eliminate Engine Interference.Designed for connecting iPod/iPhone to a device that takes a stereo 3.5mm jack input Eliminate the electrical noise and hum caused by ground loops with this ground loop isolator. These problems typically occur when multiple components receive power from different locations. This isolator solves that problem by providing ground path isolation between components while maintaining full frequency response. This device is designed to work with your iPod or iPhone's dock connector. It provides a 3.5mm male output.