INCLUDES RECEIVER, UNIPAK BODYPACK TRANSMITTER AND LAVALIER.---- The Audio Technica ATW-1811 Camera Mount UHF Wireless Mic System includes the ATW-R1810 single-channel receiver, ATW-T1801 UniPak body-pack transmitter and an omnidirectional lavalier microphone. The ATW-1811 offers UHF reception of 996 user-selectable frequencies in 25 kHz steps. It also features automatic frequency scanning, Tone Lock squelch, back-lit LCD, soft-touch buttons, headphone monitor output with independent level control, and durable metal construction. Audio-Technica's ATW-1811 camera-mount wireless microphone system provides an extremely flexible, professional, and easy-to-use portable wireless solution.