The Audio-Technica 3000 Series Wireless In-Ear Monitor System (ATW-3255) was designed to bring professional sound quality and features to all levels of performers and performance venues. System integrators for houses of worship, owners of live-performance venues and the musicians who play in them all tell us the same thing: They need an affordable, durable in-ear monitor system that is easy to use and, crucially, delivers high-quality sound with dependable RF. The 3000 Series Wireless IEM provides all that and more. With design elements modeled after our popular 3000 Series UHF Wireless Microphone Systems, the 3000 Series IEM features a rack-mount transmitter with front-panel controls and large OLED display, body-pack receiver with an efficient headphone amp (it also conveniently charges in the same ATH-CHG3 and ATH-CHG3N charging stations as the 3000 Series UHF body-pack transmitters), and ATH-E40 professional in-ear monitor headphones with propriety dual phase push-pull drivers.