Featuring the EX-503 high quality omni-directional electret condenser microphone element, the 31LT also has an input level control, a durable ABS case with snap-off belt clip, and a 3-position Power switch with Standby for muting the audio.

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Transmitter Technical Specs:
Frequency Range: 25 VHF Channels
(169.505 - 197.325 MHz) Frequency Response: 40Hz to 18KHz
(+/- 3dB) Audio Distortion: less than 1.0% (± 15K deviation)
Dynamic Range: better than 100dB
S/N Ratio: better than 95dB
Operating Temperatures: 0° C to 45° C
Operating Range: 100m under ideal conditions
Oscillator: Crystal Controlled
Type of Emission: FM
Antenna: External Antenna
Pre-emphasis: 50 Micro Sec.
MAX Input Level: 0dBm - 10dBm
Microphone: Lav. or Headset
RF Output Power: 30mW
Input Impedance: 2.2 k ohms
Audio Adj. Range: +30dB
Battery: 9v (006p)
Battery Life: 8 to 10 hours with Alkaline Battery
Dimensions: 86(H) x 60(W) x 21.5(D) mm (3.4" x 2.4" x 0.85")
Weight: 112g (Without Battery, Mic, Cable) - (3.9 oz)