Designed for Videographers on a limited budgetandvideo hobbyists, BY-WM4 PRO is a new generation 2.4GHZ less microphone system, dual-channel for capturing audio with dual subiects to your smartphones, tablets, DSLR cameras, consumecamcorders. PCS etc.<br> The BY-WM4 PRO system is suitable for a wide range of wireless applications such as interviews, mobile journalisms, reporting, Vlogging, podcasts and more. The BY-WM4 PRO system is a expandable evolution system that allows the user to mix and match different kinds of receivers while using with the TX4 Pro transmitter.