COMPACT AND WIRELESS - Pyle in ear monitor and receiver system offers tabletop stage monitoring with a wireless range of up to 330 feet. Kit includes audio system transmitter, digital belt-pack receiver, and in-ear headphones. STAGE OR STUDIO USE - Featuring UHF wide audio signal transmission with a frequency range of 902-928 MHz, this professional quality iem system operates perfectly in both a studio and stage environment. Provides consistent sound performance free from distortion and feedback issues. NO COMPLEX CONTROLS - Pyle's in ear monitor system has simple controls for hassle-free operation, plus selectable audio frequency to optimize your sound. In-ear monitors allow for volume to be set at a safe level, and also block out excess stage noise for a purer sound and enhanced performance.