ACT-707SE is a half-rack receiver in a compact metal casing.  Bright and easy-to-read LED display shows numeric channel and RF/AF strengths.  Innovative "Noise" indicator indicates if the receiver is experiencing interference.  Press the 'SCAN' button and the receiver will auto-scan and lock on to an open, interference-free frequency. Then press the 'ACT' button to automatically upload the receiver frequency to the transmitter.  Output level and dynamic range are accurately pre-adjusted to equal the microphone capsule's sensitivity, thus ensuring optimal performance of the system.  Patented and meets worldwide wireless regulations and approvals