Overview
Chairman unit designed for the WDC-903 digital wireless conference discussion system, providing priority control and high-quality audio.
Combines a low-latency LoRa control protocol with UHF-band audio transmission to ensure stable, interference-resistant communications.
Its long-life rechargeable battery and desktop design make it ideal for both mobile and permanent installations in demanding professional environments.
Technical specifications
Unit Type
Wireless chairman unit for WDC-903 conference system
Function
Desktop microphone with chairman priority
Carrier Frequency Range
521.25 MHz – 936.85 MHz
RF Bandwidth
134 MHz
Modulation
FM
Oscillation
PLL synthesized
Harmonic Radiation
< 45 dBm
Maximum Deviation
±45 kHz
Control Protocol
Low-latency bidirectional LoRa
Audio Band
UHF-band transmission
Input Connector
3-pin XLR for gooseneck microphone
RF Output Power
15 mW (typical)
Microphone Type
Cardioid condenser (gooseneck, detachable)
Frequency Response (audio)
100 Hz – 12 kHz approx.
Signal-to-noise Ratio
>= 90 dB (typical)
Battery
Rechargeable Li-ion polymer 3.7 V / 2900 mAh
Current Consumption
120 mA (typical), 60 mA in standby
Operating Time
Up to 23 hours in use, up to 48 hours in standby
Charging
Via dedicated WDC-903 charger/charging station
Indicators
Display/LEDs for RF status, battery, and audio
Dimensions
162 × 125 × 54 mm (W × D × H)
Weight
≈ 910 g
Applications
Conference rooms, city halls, convention centers, and corporate boardrooms
Key features
- Control transmission via LoRa protocol and UHF-band audio for maximum stability and range.
- Chairman priority function to manage the floor during discussions, overriding WDC-903D delegate units.
- High-fidelity circuitry with excellent sound quality and strong protection against interference from computers, mobile phones, and Bluetooth devices.
- Rechargeable lithium-ion battery with up to 23 hours of continuous operation and charging via a dedicated station.
- Full integration with the WDC-903 system, supporting configurable meeting modes and compatibility with video tracking systems and centralized control via the WDC-903M host.
Want to see this equipment working in your room?
We advise you at no cost on compatibility, installation and alternatives for your space.
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