Relacart UD-222: Wireless Desktop Microphone Base
Model UD-222
Overview
The UD‑222 is a wireless desktop base for gooseneck microphones, designed for conference systems where cabling on the table is not desired.
It operates on the UHF band with PLL synthesis, offers up to 134 MHz of bandwidth and 10 mW of RF output, and pairs with Relacart UR‑2xx family receivers.
The OLED display, gain control, low-cut filter, and silent touch button allow comfortable operation by meeting participants.
Technical specifications
Type
Wireless desktop microphone with gooseneck
Applications
Conferences, government chambers, institutions, multipurpose rooms, and corporate settings
Carrier Frequency Range
521.25 MHz – 936.85 MHz (depending on region)
Oscillation Mode
PLL frequency synthesis
RF Bandwidth
Up to 134 MHz (depending on region)
Maximum Deviation
±45 kHz
RF Output Power
10 mW
Harmonic Radiation
More than 50 dB below the carrier
Display
High-contrast OLED showing channel status, battery, frequency, etc.
Gain Control
Volume potentiometer from -10 to +10 dB
High-pass Filter
Switchable low-cut below 200 Hz
Compatible Microphone
Relacart goosenecks (e.g. GS‑380/450/530) in 340 mm, 420 mm (default), or 480 mm
Power Supply
2 × AA batteries
Current Consumption
≈ 130 mA (typical)
Battery Life
≈ 9 hours of operation with fresh AA batteries
Weight
≈ 830 g (without batteries)
Construction
Robust metal desktop base
Switch
Silent touch button for on/mute
Indicators
OLED readout and status LED per system configuration
Compatible Systems
Relacart UHF receivers such as UR‑222S, UR‑270D, and others in the 2xx series
Typical Use
Single or multi-microphone wireless conference configurations in boardrooms and meeting rooms
Key features
- UHF wireless desktop base for professional gooseneck microphones, ideal for rooms where table cabling is not desired.
- High-contrast OLED display showing channel status, battery level, and key parameters.
- Gain control from -10 to +10 dB and a 200 Hz high-pass filter to adapt pickup to the environment.
- Powered by 2 AA batteries with approximately 9 hours of battery life and a typical current draw of 130 mA.
- Robust metal design with a silent touch button, suitable for demanding institutional and corporate applications.
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