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Meant for close-range monitoring, pushing 10mW of RF.

This difference will not negatively impact the performance of this transmitter, the range will only be subdued by a minimal amount. If you require an audio surveillance transmitter that will be situated in a target location that is not abundant in obstacles, this is the transmitter for you. If you are expecting obstacles such as structures (man-made/natural) then the 20mW V1TX is a better fit.

    This is a permanent, always-on "hot-microphone", once the battery is inserted the CRTX1 will begin live transmission of ambient and surrounding audio without interruption on the Ultra High-Frequency band.

    The CTRX1 will broadcast audio over a distance of 100-300 meters in a cluttered urban environment, up to 500 meters with LOS, through concrete, drywall, and thick bush to any UHF receiver. It operates on a single button cell battery.

    Use this transmitter to remotely listen to an area of interest that requires discreet acoustic monitoring. We recommend any handheld UHF receiver capable of tuning into the 136MHz-174MHZ/400MHz-434MHz range, this is a standard range in most UHF receivers. Our recommended handheld receiver is the BAOFENG UV-5R. Your CRTX1 will arrive with its specific Tx/Rx frequency noted on its back.

    Power Supply 1x CR2032 (3v) : 25-30 Hours Of Continuous Operation.
    Dimensions 32mm x 28mm x .8mm

    100Hz ~ 20kHz Panasonic: Analog Microphone Electret Condenser. Directional Characteristic: Omni-Directional
    Sensitivity: -7.0 ±4 (0 dB = fs/Pa@1kHz).
    Signal to Noise Ratio: 78 dB Typ. at 1kHz.
    Max Input Sound Level: 101 dB SPL Typ.

    Weight Without Battery: 10g | With Battery: 11g
    Output (RF) power  10mW
    Antenna 80mm OR 120mm: .5mm NiTinol
    Frequency Range

    434MHz, 2.5 kHz step.

    Effective Range 15m From Centre. 
    Stability  Highly Stable. Crystal Referenced Phase-Locked Loop.
    Crystal 00k/ASK Data Transmitter.

    In order to maintain its longevity, the CRTX1 comes potted with a compound that seals all onboard components. Only the microphone and the battery terminal are accessible and made visible.

    Looking for something smaller and just as capable? The V3TX  is truly tiny, measuring only 13.9mm x 19.4mm x .8mm!

    (PCB REV 3.0)