Audio-Technica ATW-902 System 9 VHF Wireless Handheld Microphone  169.505 to 171.905 MHz 
Audio-Technica's System 9 is a four-channel frequency-agile wireless system designed to provide rock-solid performance along with easy setup and clear, natural sound quality.

Audio-Technica ATW-902

    Operating Frequency    VHF highband, 169 MHz to 172 MHz
    Modulation Mode    FM
    Maximum Deviation    +/-10 kHz
    Dynamic Range    >/=90 dB (A-weighted), typical
    Total Harmonic Distortion    <1% (at 1 kHz, +/-10 kHz deviation)
    Operating Range    200' (60 m) typical
    Open range environment with no interfering signals
    Operating Temperature Range    40° F (4° C) to 110° F (43° C)
    Battery performance may be reduced at very low temperatures
    Frequency Response    80 Hz to 13 kHz

    Receiving System    Non-diversity, single-channel, dual antenna system
    Image Rejection    50 dB minimum
    RF Sensitivity    20 dBuV at 60 dB S/N ratio (50 ohms termination)
    Audio Output    1/4" (6.3 mm), unbalanced: 700 mV (1 kHz modulation, 10 kHz deviation, 100k ohm load), nominal
    Power Supply    100-240V AC (50/60 Hz) to 12V DC .5A (center positive) switched mode external power supply
    Dimensions    7.48" (190.0 mm) W x 1.82" (46.2 mm) H x 5.06" (128.5 mm) D
    Net Weight    11.8 oz (335 grams)
    Accessory Included    Power supply

    RF Power Output    10 mW
    Spurious Emissions    Following federal and national regulations
    Batteries    Two 1.5V AA Alkaline (not included)
    Battery Life    8 hours (alkaline) 
    Depending on battery type and use pattern
    Dimensions    9.91" (251.8 mm) long, 
    2.11" (53.5 mm) diameter
    Net Weight    9.2 oz (260 grams) 
    (without battery)
    Accessory Included    AT8456a Quiet-Flex™ stand clamp

851 St. Michael’s Drive, Santa Fe 87505
Hours: Monday thru Saturday 9:30-6:00
          Sunday 12:00-5:00