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The BOYA BY-LM400 is a dual-lavalier microphone designed for recording interviews. With a 3.5mm (1/8") TRRS connector, it works for iPhone, iPad, and most Android devices. Its omnidirectional condenser capsule captures sound equally from all sides. This design allows for effective, hands-free recording of speeches, interviews, dictations, and more. It uses a TRRS connector to connect to your smartphone or tablet's headphone input. With a 4m (13') cable, the BOYA BY-LM400 can be used for presentations, podcasts, webcasts, or any situation where more than one subject needs to be recorded.