The Sescom Canon 5D MkII DSLR Magic Lantern AV Out Headphone Monitoring Cable can be used with a 5D MkII camera that is loaded with Magic Lantern firmware. With this cable you can attach a standard pair of stereo headphones with a mini connector to the AV out jack on the camera and monitor the quality of the audio while recording live HD footage. This specialized cable eliminates the need for multiple adapters that are required with the AV out cable that ships with the camera.