Controls: Mute Adjust, Output Level Adjust.

Audio Output: 600 unbalanced .

Connectors: Audio Output and Headset input: 3.5 mm mini jacks.

LED Indicators: Power On (single flash), Low Battery Alert (steady) and Transmitter "TX".

Mute: Externally adjustable; with preset minimum.

Image Rejection: 60 dB image and spurious.

Battery: 9V alkaline.

Dimensions: 5.70" x 2.50" x 1.10" (14.5 x 6.4 x 2.8 cm). Weight: 5 oz (141 g.)

Frequency Response: 25 Hz-20 kHz ±3 dB.

Dynamic Range: 120 dB.

Total Harmonic Distortion: < 0.3%.

RF Carrier Freq: Selected frequencies between 169 and 216 MHz.

Modulation: FM ± 15 kHz.

Operating Range: 250 feet typicalup to 500+ feet line-of-sight.