the equipment each picker is using consists of a headset connected to a compact talkman terminal carried in a belt. all communication with the voice-application (which is the interface to the wms-application) is wireless via wlan.

This is all lower case. Can you fix that?
The equipment each picker is using consists of a headset connected to a compact Talkman terminal carried in a belt. All communication with the voice-application (which is the interface to the WMS-application) is wireless via WLAN.