"Diversity" design houses two antennas and a receiver circuit in a single chassis, automatically switching between the two for clearest and strongest signal. * The SR55 features variable squelch, six-segment LED RF level and audio level metering, dual front mounted antennas and XLR and 1/4" outputs. * SE10T earset and cable to plug in an wear on-the-go. * Channel 17 (174.1MHz) Fitness System * "Diversity" design houses two antennas and a receiver circuit in a single chassis, automatically switching between the two for clearest and strongest signal. ^The SR55 features variable squelch, six-segment LED RF level and audio level metering, dual front mounted antennas and XLR and 1/4" outputs. ^SE10T earset and cable to plug in an wear on-the-go. ^Channel 17 (174.1MHz) Fitness System