This is the A frequency range version of the Sennheiser SK100 G2 bodypack transmitter which features nine selectable frequency banks with four frequency presets available for direct channel selection. There's an Autoscan function for simple and secure frequency selection, rugged all-metal construction for durability, pilot tone squelch, and transmitter battery status telemetry. Audio signal metering is available on the unit's LCD display. Includes a convenient "low battery" indicator.