· Worry Free Manufacturer Warranty: 24-month warranty available on all Sound Town NESO series wireless microphones (both NESO-U2 and NESO-U4). No additional charge or additions required to be eligible for the worry free warranty. The NESO series wireless microphones are built with top-class components and rock-solid quality.· The Ultra-High Frequency (UHF) microphone system minimizes radio frequency interference and noises generated by other electronic equipment and digital devices. The wireless system provides cordless freedom and ease of use. 200 selectable UHF frequencies for interference free operation.· Easy to set up and operate with independent volume controls. Frequencies are compliant with the Federal Communication Commission’s new rules governing wireless systems. Wide Frequency Response Digital Control Circuit resists unwanted interference; low THD (Total Harmonic Distortion) protects your PA system from pops and distortion and produces accurate reproduction of an audio recording.· Up to 400 feet line-of-sight operation range with stellar sound quality. Ideal for conferences, broadcasting, weddings, Karaoke, social events and any small to medium-sized venues such as meeting rooms, auditoriums, schools, churches and stages.· In the package: 1 X NESO wireless microphone receiver, 4 X lavalier wireless microphones, 4 X bodypack transmitters, 1 X 1/4” audio cable, 1 X power adapter, 2 X 1U rackmount ears, 1 X user manual.