Sennheiser SL HEADMIC SET DW-4-US R SpeechLine Digital Wireless SL Headmic Set DW-4-US R Wireless Mic with Rackmount KitThe SpeechLine Digital Wireless SL Headmic 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 SL Headmic 1 headworn 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 Headmic Set requires no settings to be adjusted. The