For Presenters and Broadcasters, Handheld Microphone/Transmitter, Cardioid Pickup Pattern, 1/2-Rack Antenna-Diversity Receiver, 114 Auto-Scan Frequencies, AA Batteries, 500' Range. The Bogen Communications UHF8011HH is a rackmount wireless handheld microphone system that brings reliable transmission and high-quality audio to presenters performers clergy and lecturers. Fast to set up and easy to operate it is suitable for A/V installations in lecture halls conference rooms and houses of worship as well as for use in broadcast applications.The UHF8011BP features a half-rack receiver with antenna diversity reception via dual detachable 1/2 wave antennas in the rear. The receiver's auto-scan function searches a 36 MHz UHF tuning range with 114 selectable frequencies available seeking out a clean interference-free channel even when operating multiple systems simultaneously.This configuration comes with a handheld microphone with a built-in transmitter. The transmitter runs on two AA batteries with a switchable 10 or 50mW RF power output and a line-of-sight transmission range up to 500'.