The BOYA BY-M1DM is a Dual Lavalier Universal Microphone, with a single 1/8" stereo connector, it can be used with smartphones, DSLR camears, camcorders, audio recorders, PC and other recording devices.It consists of two of the well-received omnidirectional lavalier microphones and 4m (13') length cable, it’s prefect for interviews, presentations, podcasts, webcasts, or any situation where more than one subject needs to be recorded.Its 4m(13’) cable provides 2.8m(9.2’) of distance between each microphone for comfortable placement, while the included tie clips allow for hands-free use. Wide Range of Compatibility Compatitable for Smartphones, cameras, camcorders, audio recorders, tablets,and other audio/video recording devices Omnidirectional Polar Pattern:The omnidirectional polar pattern provides excellent off-axis response, even if a subject turns their head while speaking Designed for recording interviews:Dual omnidirectional lavalier microphones can record two sound resource at the same time.