I'm selling this because I'm replacing my camera. I've only used it a few times, so it's in very good condition. ■ Product Contents Main unit, windjammer, dedicated pouch ■ Product Information (reprinted from the official website below) A compact microphone of approximately 72g that achieves three polar patterns. A shotgun microphone compatible with digital audio interfaces. ・ A compact "3-in-1" shotgun microphone with three switchable polar patterns Equipped with three polar patterns: "super-directional" for emphasizing the sound directly in front of the camera, "unidirectional" for recording a wide range of sounds in front, and "omni-directional" for maintaining equal sensitivity in all directions. Furthermore, you can easily switch to your preferred polar pattern with a single switch. ・ Achieves super-directivity despite its very compact size, thanks to a signal processing system using a digital signal processor with beamforming technology Achieves super-directivity despite its very compact size of approximately 79.3mm in length. It combines four high-performance microphone units with digital signal processing to enhance sensitivity in the forward direction and employs a beamforming signal processing system that cancels out sounds from directions other than the front. It achieves both a compact size and super-directivity. ・ High-quality sound recording without degradation through thorough noise suppression It can transmit audio directly to compatible cameras as a digital signal. This enables high-quality sound recording without degradation. ・ Battery-free and cable-free for free shooting Compatible with the Multi Interface Shoe, power can be supplied from the camera to the ECM-B10. ・ Various audio settings are possible Various settings are available, such as the DIGITAL/ANALOG switch, AUDIO LEVEL dial, ATTENUATOR (ATT) switch, and AUTO/MAN switch.