The Sony ECM-W3 is Sony's compact wireless microphone system for Sony camera users — a transmitter and receiver that communicates directly with compatible Sony mirrorless and DSLR cameras via the Multi Interface Shoe without any cables or separate receiver hardware, providing a completely wireless audio solution that integrates invisibly with any compatible Sony camera body. The 2.4GHz digital transmission provides 100-metre range, and the transmitter's built-in directional microphone provides ambient sound recording from the subject's position for behind-the-scenes and location production scenarios. Multi Interface Shoe integration — wireless audio with zero cables 100-metre range — any location and interview scenario Built-in directional microphone on transmitter For Sony mirrorless and DSLR users — invisible system integration