The Boya BY-WM4 PRO-K3 is a compact, entry-level wireless lavalier microphone system offering an easy-to-use, cost-effective, and all-inclusive solution for recording one subject to your iOS mobile device. The system delivers improved sound quality over the built-in mics on cameras and mobile devices to supply clear, intelligible speech for journalists, YouTube/Instagram creators, TikTok personalities, vloggers, and more.