VHF Portable Transmitter & Receiver ATR35 Miniature Lavalier ATR20 Dynamic Handheld Microphone Normal operating range 100'; up to 300' under optimum conditions Two user-switchable frequencies for interference-free operation Includes earphone for real-time monitoring capability Durable, rubber-coated, flexible receiver antenna can be positioned for best reception Includes belt-clip and quick, reliable camera mount adapter for easy positioning and use