Audio-Technica ATW-3131b Wireless Lavalier Microphone System (Band C: 541.500 - 566.375 MHz)

Model #ATW-3131BC

Audio-Technica Warranty
Audio technica atw 3131bc 1
Audio technica atw 3131bc 1
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Type of Input Connector High Impedance / Low Impedance / Bias UniPak Connection
Level Control Input Level Control: -6 dB / 0 dB / +6 dB / +12 dB
Mute Switch Power / Mute switch dual function
Display Back-Lit LCD Display & Battery / Signal Status LED
RF Output High: 30 mW, Low: 10 mW (switchable), at 50 ohms
Spurious Emission Following federal and national regulations
Batteries 2 x 1.5 V AA Alkaline not included
Battery Life (approx.) High: 6 hours (alkaline) Low: 8 hours (alkaline) Depending on battery type and use pattern.
Antenna Type BNC Flexible UHF
Dimensions 2.60 x 3.43 x 0.94" (66.0 x 87.0 x 24.0 mm)(WxHxD)
Weight 2.9 oz (81 g) without batteries
Type of Transmitter Frequency Agile Bodypack


Approx. Working Range 300' (91.4 m)
Frequency Response 70 Hz to 15 kHz (+1 dB, -3 dB)
Modulation Mode FM
Maximum Deviation ±35 kHz
Dynamic Range > 110 dB (A-weighted), typical
Total Harmonic Distortion
# Of Channels 200 Channels
Type of System UHF Frequency Agile Bodypack
# Of Simultaneous Systems 6
Operating Temperature 23 to 113°F (-5 to +45°C) Battery and LCD performance may be reduced at very low temperatures
RF Carrier Frequency Range Band C: 541.500 - 566.375 MHz


Mounting Options Table Surface / Rack Mountable rack ears included
Type of Receiver True diversity
Type of Outputs Unbalanced: 1/4" TS (mono) phone jack Balanced: XLRM-type
Image Rejection 60 dB nominal, 55 dB minimum
RF Sensitivity 20 dBuV at 60 dB S/N ratio
Maximum Output Level XLR, balanced: +9 dBV 1/4", unbalanced: +7 dBV
Antenna Input BNC-type, 50 ohms Bias voltage 12V DC, 60 mA, each
Power Requirements 120 VAC 60 Hz; 12-18 VDC, 500 mA, center positive, with external supply
Display Back-Lit LCD Display & Battery / Signal Status LED
Dimensions 8.27 x 1.73 x 6.47 (210.0 x 44.0 x 164.4 mm) (WxHxD)
Weight 2.4 lb (1.1 kg)

Packaging Info

Package Weight 5.7 lb
Box Dimensions (LxWxH) 15.1 x 13.3 x 3.9"


Type of Microphone AT831cW Lavalier - Condenser
Polar Pattern Cardioid
Product Highlights
  • ATW-R310b Receiver
  • ATW-T310b UniPak Transmitter
  • AT831cW Lavalier
  • Band C: 541.500 - 566.375 MHz
In The Box
  • Audio-Technica ATW-3131b Wireless Lavalier Microphone System (Band C: 541.500 - 566.375 MHz)
  • ATW-R310b Receiver
  • ATW-T310b Bodypack Transmitter
  • AT831cW - Mini Cardioid Condenser Mic
  • Power Supply
  • 2 x UHF Receiver Antenna
  • Rack-Mount Adapters
  • Limited 2-Year Warranty
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