Broadcast-quality UHF wireless lavalier microphone system with camera-mountable portable receiver, UHF frequency spectrum helps you avoid interference Headphone monitor output enables you to always listen to your sound, even if your camera lacks a headphone jack Easy-to-use with plug-and-play operation, easy-to-read backlight LCD displays on both units, included microphone and output cables feature locking connectors to prevent unplugging Wireless Infrared synchronization makes it easy to sync channels between the receiver and transmitter, 16 Selectable Channels for running multiple systems Up to 330-ft (100M) operating distance, mute button function with red flashing LED to remind you it�s Muted