Products / Microphones / UB-222 Wireless Boundary Surface Microphone
Relacart

Relacart UB-222: Wireless Boundary Surface Microphone

Model UB-222

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Relacart UB-222 Wireless Boundary Surface Microphone — vista 1

Overview

The UB-222 is a wireless boundary surface microphone designed for conference and education applications where discreet, shared pickup of multiple speakers around a table is required.

Its cardioid condenser capsule with a wide pickup angle provides clear voice reproduction and effective rejection of off-axis noise.

UHF transmission with PLL and a wide RF band allows multiple systems to operate in parallel with high stability and low interference risk.

Technical specifications

Type

UHF wireless boundary surface microphone

Element

Fixed-charge back plate permanently polarized electret condenser

Polar Pattern

Cardioid, approximately 120° pickup angle

Carrier Frequency Range

470 MHz – 936.85 MHz (depending on region/version)

Modulation

FM

Oscillation

PLL synthesized

Harmonic Radiation

< 45 dBm

RF Bandwidth

134 MHz (depends on region)

Dynamic Range

> 95 dB (A-weighted)

Frequency Response

50 Hz – 17 kHz

RF Output Power

25 mW / 4 mW selectable

Maximum Deviation

±45 kHz

Volume Control

Audio potentiometer -10 ~ +10 dB

High-pass Filter

Switchable, 200 Hz / -6 dB

Battery

2 × AA

Current Consumption

≈ 130 mA (typical)

Battery Life

Approximately 9 hours

Dimensions

110 × 110 × 40 mm (W × D × H)

Weight

≈ 505 g

Construction

Low-profile metal body for table or surface mounting

Control/Integration

Microphone switch compatible with external central control systems or auto mixers

Applications

Conference rooms, meeting tables, classrooms, courtrooms, and training spaces

Compatible Systems

Relacart UHF receivers such as UR-230, UR-270, WAM-432, and other 222/230 series wireless microphone systems

Key features

  • Low-profile boundary design for discreet placement on conference tables and podiums.
  • Cardioid condenser capsule optimized for voice, with a 50 Hz to 17 kHz response and a wide pickup angle.
  • UHF transmission with wide-band PLL (up to 134 MHz) and selectable RF power of 25 mW / 4 mW to adjust coverage and power consumption.
  • Audio level control via a -10 ~ +10 dB potentiometer and a switchable 200 Hz high-pass filter to reduce low-frequency noise.
  • Powered by 2 AA batteries with approximately 9 hours of battery life, suitable for full workdays.
  • Compatible with Relacart UHF receivers and wireless mixers such as UR‑230/UR‑270 and the WAM‑432 system for professional AV integration.

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