Sennheiser SL LAVALIER SET DW-4-US R SpeechLine Digital Wireless SL Lavalier Set DW-4-US R Wireless Mic System with Rackmount KitThe SpeechLine Digital Wireless SL Lavalier Set DW 4 US R from Sennheiser is a wireless microphone system with rackmount kit that includes a bodypack transmitter, a stationary receiver, and a MKE 1 lavalier microphone. It can be used to capture speech in applications for lectures, meetings, conferences, and more. Featuring bi directional communication between transmitter and receiver, the SL Lavalier Set requires no settings to be adjusted. The