Audio-Technica ESW-T4101 Bodypack Transmitter

The ESW-T4101 is a lightweight bodypack transmitter for Audio-Technica's Engineered Sound Wireless DECT system, built in with a high-quality omnidirectional microphone so it works right out of the box, plus an on/off/mute push-button for quick control at the belt. A cH-style screw-down 4-pin input connector lets it swap to an external cH-style lavalier or headworn mic when the built-in capsule isn't the right fit for the application.

A user-replaceable lithium-ion battery (LI-220) delivers roughly 25 hours of runtime and charges in the ESW-CHG4 charging station, sold separately. The transmitter ships with a belt clip and removable neck strap for either beltpack or lanyard wear. The /831CH bundle pairs the transmitter with Audio-Technica's AT831cH cardioid condenser lavalier microphone, so a house of worship or corporate AV team gets a matched lav-and-transmitter kit in one SKU instead of sourcing the mic separately.