Sennheiser Speechline Digital wireless Presentation Set. SL LAVALIER SET DW-3-AU R Experience Simplicity with Sennheiser SpeechLine Digital Wireless Microphones The world’s first digital wireless microphone exclusively for speech. No audio know-how is required – it’s already built in. SpeechLine Digital Wireless comprises of mobile transmitters (handheld or bodypack) tailored for presentation, speech optimized microphone capsules (condenser capsules, lavalier or headworn microphone) and an easy-to-integrate stationary receiver. For convenience, the system relies on lithium-ion technology with a battery lifetime of more than 15 h and flexible charging solutions of multi-device chargers or USB-charging on the fly. Thanks to the Automatic Frequency Management, the system always finds a free frequency (no frequency planning is necessary anymore). The Automatic Sensitivity Management makes the setup even more convenient, no more gain settings are required. With seamless network integration the system can be controlled via AMX, Crestron or a dedicated remote control app available for iOS or Android, which makes SpeechLine DW easy to monitor and to manage. For secure communication, SpeechLine Digital Wireless uses the secure advanced 256-bit AES encryption for secure wireless transmission Speechline Digital wireless Presentation Set. Includes: Halfrack receiver, bodypack tranmsitter and MKE 1 Premium Lavalier micropone. 1.9GHz DECT Opereation. With Rack Mount kit