Sensear SM1R Smart Muff Headset Two-Way Radio PoweredPRODUCT DETAILS The SM1R Series is built specifically to enhance two way radio communication in high noise environments. The headset is unique from the rest of Sensears portfolio in that it contains no battery and instead is powered by the radio, making the unit lighter and more comfortable for the user. Similar to the rest of Sensears portfolio, it pairs Sensears patented SENS technology and a noise cancelling boom mic to allow users in high noise