Saramonic SR-PAX2 Audio Adapter for Mirrorless, DSLR & Black Magic Pocket Cameras (Red/Black) It is a compact and lightweight mixer ideal for recording professional-quality audio from two sources and mixing them into your camera. 9V batteries required, best with Polaroid 9V batteries. The SARAMONIC SR-PAX2 is a two-channel active audio mixer with preamplifier and phantom power, specially designed for mirrorless digital camera, Blackmagic Design pocket cinema camera and DSLR camera with a microphone jack. It attaches to the base of a camera, and a threaded socket on its base allows for mounting on a tripod or case. for DSLR camera, Mirrorless Digital Camera, Blackmagic Design Pocket Cinema Camera Input 1: Two Mono 1/8""(3.5mm) Inputs One Stereo 1/8""(3.5mm) Input 2: Two Balanced XLR Inputs Mic / Line Switchable VU Meter Switchable 3 and 5V Phantom Power for Input 1 +48V Phantom Power for Input 2 Headphone Monitor Output Mono / Stereo Output Switch