Saramonic SR-AX107 2 Channel Transformer XLR Audio Adapter with Phantom Power & Monitor (Red/Black) The SARAMONIC SR-AX107 is a 2-channel XLR audio adapter with preamplifiers and phantom power, ideal for any DSLR cameras with a built-in microphone jack. 9V Batteries required, best with Polaroid 9V batteries. Wide-variety of audio devices like professional condenser microphones, wireless microphones, external audio mixers, sound boards and more can be connected to the camera via this adapter. The SR-AX107 makes your recording work much easier. Level Meter allows you to verify the proper input levels in real time, the output signal can be adjusted by the level controls for optimum recording. The phone jack lets you monitor the audio from the adapter during recording, or camera during playback. The AGC disable feature reduces noise during quiet moments of recording by stop using the cameras' Auto Gain Control function. Low Noise Preamps with Gain Settings Built-in isolation transformer Switchable 12V and 48V Phantom Power Headphone Monitor Output Monitor from PLAY/REC AGC Disable Feature Two Balanced XLR Inputs Mic / Line / Phantom Switchable Mono / Stereo Output Switch Level Meter LED PEAK Indicators