Included Charging Case: A small charging case is included in the package, allowing you to continue shooting without worrying about running out of battery power Quality Manufacturing: The Sony ECM-W3S comprises a microphone-transmitter featuring high signal-to-noise (S/N) ratio microphone units, and a single-channel receiver Compact and Lightweight: Both the microphone- transmitter and receiver have excellent mobility and portability and are compact and lightweight enough not to get in the way when carrying or shooting Noise Suppression: A noise cut filter using digital signal processing to effectively remove noise, and a low cut filter that reduces noise in the low-frequency range, are provided on the microphone side Quality Digital Transmission: Connecting the receiver to a camera from Sony that supports the Multi Interface (MI) Shoe allows the digital audio signal output from the receiver to be recorded directly by the camera, enabling high-quality recording