Includes PRO-R500 receiver, PRO-T501 transmitter and PRO 92cW headworn microphone. 8 selectable frequency-coordinated UHF channels. Use up to 8 simultaneous systems - all channels compatible. Automatic frequency scanning. Diversity operation for increased range/reliability. LED Channel display plus Antenna, AF Peak indicators. Balanced XLR and unbalanced 1/4-Inch output connectors. Tone Lock squelch system eliminates interference when transmitter is off. UniPak transmitter features: separate guitar/mic trim control, switchable high/low RF power, internal channel selector, multi-color battery/power indicator, AA operation. Handheld transmitter features: variable trim control, internal channel selector, multi-color battery/power indicator, AA operation. Pro Series 5 body-pack systems are compatible with all Audio-Technica Wireless Essentials microphones and cables. Includes rugged storage/road case designed to fit all components