This cable allows you to record all ATC and cockpit intercom transmissions on your X4. Your X4 is great in the cockpit, but to capture the entire story, you need the audio from your headset, intercom, and radio. This cable makes that possible while also providing you the option to power your X4 indefinitely by connecting to a USB battery pack. Use this cable to connect your X4 to your intercom. Plug one end into the side of the X4 and the other into a standard PJ jack. The X4 will record everything you hear and say through the headset, including intercom and ATC communications. Record indefinitely by plugging a USB battery pack into the power input. This cable is very easy to use. The door on the side of the X4 is removable, allowing you to plug the cable and included adapter into the camera. The cable also includes a female plug to plug your headset into, so you're not blocking an intercom jack.