The DXA-5Da is very easy to set up and use. The level meters show the exact signal strength at a glance while the headphone output lets you monitor what you are recording. A unique AGC Disable feature controls the wild swings of the Auto Gain Control that plague most cameras. This reduces the noise during quiet moments of recording allowing you to record two channels of clean audio. Fits neatly under any camera and can also be mounted to a tripod. Operates on one 9 volt battery.