Nux B-3RC Rechargeable Wireless Microphone System 2.4GHz

The B-3RC is a self-contained, rechargeable wireless microphone system operating on the license-free 2.4GHz band. Supplied with an NDM-4 dynamic microphone, the system includes a plug-in XLR transmitter and receiver, offering a complete, easy-to-use solution for vocalists, presenters, and content creators. The transmitter attaches directly to the mic, while the receiver connects to a mixer input, PA system, or even a DSLR camera’s aux input—making it versatile for both live and recorded applications.

The system also works without the microphone, allowing wireless transmission of a mixer’s output to an active speaker. Featuring auto-pairing, the B-3RC automatically scans for the most stable frequency within your selected channel, providing a digitally encrypted connection with robust signal integrity. With 6 channels to choose from, and multiple frequency hops per channel, it ensures reliable performance even in congested environments.

Both transmitter and receiver store neatly in the included custom charging case, which features an internal power bank and USB-C input for convenient recharging and battery monitoring. Operating in the 2.4GHz range, the B-3RC can be safely used alongside standard VHF and UHF systems, making it a flexible and modern addition to any audio setup.

Highlights

• 2.4GHz license-free wireless system with digital signal transmission
• Supplied with NDM-4 dynamic microphone + plug-in XLR transmitter and receiver
• Compatible with any XLR dynamic microphone
• Receiver connects to PA systems, mixers, or DSLR cameras
• Can also be used to wirelessly transmit mixer output to active speakers
• Auto-pairing selects the most stable frequency within 6 available channels
• Digitally encoded signal ensures strong, interference-resistant performance
• Rechargeable via custom charging case with built-in power bank
• USB-C charging with battery status indicators
• Operates alongside VHF and UHF systems without interference

Technical Specifications

• Transmitter & receiver battery: Li-ion 3.7V, 330mAh each
• Charging case capacity: 3.7V, 3000mAh internal power bank
• Runtime: Up to 3.5 hours on a full charge
• Recharge time: Transmitter/Receiver approx. 2.5 hours, Charging case approx. 4 hours
• Carrier frequencies: 2.404 – 2.479GHz (6 groups × 3 frequencies per group)
• Operating range: Up to 30 metres (line-of-sight)
• Latency: Less than 4.8 ms
• THD + N: Less than 0.1% at 1kHz
• Microphone type: NDM-4 dynamic cardioid
• Microphone impedance: 600 ohms
• Microphone sensitivity: -48.4dB
• Connection (Transmitter): XLR female (XLRF)
• Connection (Receiver): XLR male (XLRM)
• Transmitter dimensions: 80 × 24 mm Ø
• Transmitter weight: 36g
• Receiver dimensions: 80 × 24 mm Ø
• Receiver weight: 36g
• Microphone dimensions: 164 × 50 mm Ø
• Microphone weight: 213g