The Shure MX690 Microflex Wireless boundary microphone offers total freedom of placement with no holes to drill or cables to run for installation. The MX690 plate mic is a both a microphone and a wireless transmitter, and is the perfect solution for conference and meeting spaces where users demand flexibility and high performance. It's compatible with Shure SLX wireless systems, including the SLX4L receiver, with logic output for applications requiring logic functionality.