Controls: Power ON/Off.

Audio Output: 3.5 mm jack, nominal mic level.

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

Mute: factory preset minimum.

Image Rejection: 60 dB image and spurious.

Battery: 9V alkaline.

Battery Life: 10 hours.

Dimensions: 4.75" x 2.50" x 1.40" (12.1 x 6.4 x 3.6 cm)

Weight: With out Battery: 4 oz. (110 g), With Battery: 5.3 oz (150g).

Frequency Response: 40-12 kHz ± 3 dB.

Dynamic Range: >100 dB.

Harmonic Distortion: <1.5%.

RF Carrier Frequencies: Selected frequencies between 81 and 88 MHz.

Freq. Stability: ±.005% crystal controlled.

Modulation: FM ± 15 KHz.

Operating Range:150 feet typicalup to 500 feet line-of -sight.