The BOYA BY-XM6-S4 is a 2.4GHz dual-channel wireless microphone system that consists of two transmitters and one receiver. It provides high-quality sound for Apple iOS devices with lightning ports. Ideal for vlogging, content creation, live streaming, interview, recording, etc. 2.4GHz Technology Delivers High-Quality Audio BY-XM6-S4 produces high-fidelity, professional audio by accurately reproducing tone across the 2.4GHz digital frequency. The system avoids interference from TV and radio waves by operating in the 2.4 GHz frequency band, which transmits stable and interference-free signals with a range of up to 100m. With a longer operation distance and a battery life of up to 7-hours, users can take wider and more expansive shots without fear of dropouts and have the ability to shoot for an entire day on one charge.