For Videographers, Journalists, Vloggers 2 Omni Lav Mics and Built-In Omni Mics 2 Ultracompact Clip-On Pro Transmitters Ultracompact Dual-Channel Pro Receiver Separate 3.5mm Main & Headphone Outputs Easy to Use, Informative OLED Screens Mute Function, Mono/Stereo Output Mode Internal 8-Hour Batteries, Charging Case 3.5mm Cables for Camera & Mobile Device 18 Systems at Once Max, up to 328' Range