Audio-Technica Easy Set Up Presentation ATW-2129a Wireless Lavalier UHF System in Band I with SKB 3I Series Mil-Std Waterproof Case with cubed foam for customization This system operates on Band I / 487.125 to 506.500MHz Automatic Frequency Scanning, this will search for the frequency that is available in the area Tone Lock Squelch System fights interference Rugged metal half-rack receiver with soft-touch controls and LCD display Clear sound quality and rock-solid, dependable performance