Audio-Technica ATW-3211/831DE2 3000 Series Wireless Lavalier System (AT831cH, DE2 Band)

The ATW-3211/831DE2 is a single-channel body-pack system from Audio-Technica's 3000 Series (Fourth Generation) UHF line, built for presenters, worship, and installed AV that need reliable wireless with wide tuning. It pairs the ATW-R3210 True Diversity receiver with an ATW-T3201 UniPak body-pack and ships with an AT831cH cardioid condenser lavalier.

The DE2 band spans 470.125 to 529.975 MHz with 25 kHz tuning steps, and the system supports up to 40 channels per band for multi-mic coordination. The body-pack transmits at 30 mW (switchable to 10 mW) on two AA batteries, and the receiver holds a working range near 100 m (328 ft) in the clear.