Beachtek DXA-SLR PURE Audio Adapter Passive audio adapter for DSLR and mirrorless cameras provides pure, clean audio from preamplified sources such as wireless mics and mixing boards Passive circuitry requires no power to pass the audio signal and is completely noise free and virtually unclipable for superb audio Dual transformer balanced inputs with premium quality Neutrik combo  / XLR connectors for easy hookup to balanced or unbalanced outputs Built-in VU meter and headphone jack for monitoring the audio with optional loopback from your camera for confidence sound Robust circuitry with a rugged chassis for dependable performance - please look at our active models with built-in preamplifiers for use with wired microphones