The SpeechLine Digital Wireless SL Bodypack DW-4-US from Sennheiser is an SL Series wireless transmitter optimized for speech. It can be used when paired with an optional wireless receiver and microphone in applications for meetings, lectures, conferences presentations where every word matters. In addition, it is compatible with all Sennheiser microphones such as the SL Headmic 1 or MKE 1 (sold separately).

Featuring bi-directional communication between transmitter and receiver, the automatic frequency and interference management allows for convenient and reliable operation, which means the SL bodypack requires no settings to be adjusted. The LC display provides the link name, battery status and reception quality, and the easy-to-access mute-slider makes the use of the microphone very convenient.

Furthermore, the SL bodypack comes with a rechargeable BA 30 accupack that is built with external charging contacts – for easy charging with the CHG 2 and a USB socket. It provides up to 15 hours of operating time on a full charge. Finally, Sennheiser Control Cockpit software (download) offers easy handling, control, and maintenance for the SpeechLine Digital Wireless System. It provides a global overview of all network-enabled devices, shows all status information, and makes setting adjustments very easy.