DigiTRU Diversity for optimum range with freedom from dropouts . Utilizes the uncluttered UHF frequencies for Interference-free operation in any application or locale. Locking 3.5mm mini-jack provides secure connection for removable microphone or instrument cable. Both 1/4" unbalanced and XLR balanced outputs. Tone squelch for locking out potential interference. A/B diversity and 5-segment AF level LED displays. Volume and mute (squelch) adjust control. Special circuitry for noiseless transmitter on/off switching. Frequency response: 30Hz-18kHz. Half-rack receiver design with retractable front-panel dual antennas . Unique snap out panel locking tabs for single or dual receiver optional rack mounting. Transmitter operates using one 9V battery. Includes AC/DC adapter