The BeachTek DXA-5Da is a two-channel, transformer balanced XLR adapter for attaching external microphones and other audio gear to any DSLR camera that has a built-in mic jack. It can also be used with any camcorder or other audio recording device that has a mic jack. The The BeachTek DXA-5Da uses high quality balancing transformers, which are completely noise free for superb audio. The The BeachTek DXA-5Da is very easy to set up and use. It allows you to connect a wide variety of audio devices including professional microphones, wireless systems and even take a feed from a house sound system or mixer. The built-in level meters show the input signal strength at a glance while the trim controls allow you to adjust the input level for optimum recording. The headphone jack lets you monitor the audio that is coming out of the adapter. A unique feature of the The BeachTek DXA-5Da is the ability to control the wild swings of the Auto Gain Control that plague most cameras. This dramatically reduces noise during quiet moments of recording. The adapter mounts to the bottom of the camera and can also be mounted to any standard tripod.