Dual-Mic
ENC
1,300ft (400m)
LOS Range
Group
Communication
Expandable Cascade
Connection
1.9GHz
Frequency
Cozy Headset
Fit
Flexible Configuration
& Upgrade
Extended Battery Life
Introducing Hollyvox G51, the ultimate full-duplex wireless intercom system recognized for its unparalleled professional performance. With advanced dual-mic Environmental Noise Cancellation (ENC) technology, this professional full-duplex wireless intercom system ensures unparalleled communication clarity, ideal for production teams working in loud environments. The ergonomic headset design offers optimal stability and comfort, allowing you to stay focused on your tasks. With an impressive LOS range of 1,300ft (400m), it is the ideal choice for small- and medium-scale events such as stage performances and sports events, enabling seamless team coordination through extensive and interference-free communication.
Team Communication
to the Next Level

The Power of ENC to Excellent Audio Clarity

-
Environment Sound
Reverse Internal

-
User Sound
+
Environment Sound

-
Up to 20 dB for noise
Cancellation with ENC

-
Sounds Output to others
Precise Communication
with Group Talk
Complete Connectivity for
Seamless Communication
Our device also supports connection to other Hollyvox intercom systems via the 4-wire interface
2-wire and 4-wire audio systems using the 2-wire interface and 4-wire interface
Hollyvox’s Walkie-Talkie Converter to work with a wider range of walkie-talkies.

Impressive Communication
Range with 1.9GHz for
Enhanced Connection
Stability
Increased Communication
Stability and Reliability

Immerse Yourself in Audio
Excellence
-
200Hz–7kHz
Frequency Range
-
16kHz
Sampling Rate
-
60dB±2
SNR
-
<1%
Distortion
Enhanced Design for
Maximum Comfort and
Superior Audio
The brand-new headsets (including the single-ear headset and double-ear headset) developed by Hollyvox offer maximum comfort and superior audio quality, with a structure that better fits the human ear and effectively reduces environmental noise. In addition, a wide range of headset accessories, such as mic cushion and head beam, is available for easy replacement on-site, promoting cleanliness and hygiene. Simply use them as needed and enjoy an exceptional wireless intercom experience.
Configure Your Device
Anywhere, Anytime
Seamlessly unleash the maximum capabilities of the device by utilizing the base station, Hollyvox app, and web page for device configurations and upgrades.
Web Page
Hollyvox App
Base Station
Continuous Power Supply
for Uninterrupted
Communication
Each beltpack comes with two replaceable lithium polymer batteries with an operating time of up to 6 hours. The included charging base completely alleviates concerns about low power, as it can fully charge 8 beltpacks and 8 batteries in merely 2.5 hours at a time. The base station supports power supply through POE or NP-F batteries, ensuring uninterrupted communication regardless of the power source.

Incredible Form
Factor Effects
The beltpack features detachable antennas for easy replacement and added robustness, along with a secure TALK button. Weighing around 200g (7oz), the beltpack is crafted using double injection molding technology, providing a comfortable grip and improved drop-proof performance with its matte finish.
The headset with a military-inspired design features a metal head beam, specifically engineered to deliver optimal scratch-proof performance.
The base station is crafted with high-quality aluminum alloy, featuring a robust construction that ensures exceptional resilience, even in the most demanding environments.
SKUs
RU51 Wireless Intercom System RRU x1

Electret Mic ENC Single-Ear Headset x8

BP51 Wireless ENC Intercom Beltpack x8

Beltpack Battery Charging Base x1

External Fiberglass Antenna x2

Beltpack Battery for BP51 x16

4-Pin XLR Adapter x1

Neck Strap x8
POE Adapter x1
3/8 Mounting Screw x1

Crab Clamp for RU51 x1

RRJ45 to Dual XLR Cable x1

Hard-Shall Carry Case x1

RJ45 to XLR Cable x1

AC Power Cable x2

USB-A to USB-C Cable x1

User Manual x1

Warranty Card x1

RU51 Wireless Intercom System RRU x1

Electret Mic ENC Single-Ear Headset x4

BP51 Wireless ENC Intercom Beltpack x4

Beltpack Battery Charging Base x1

External Fiberglass Antenna x2

Beltpack Battery for BP51 x8

4-Pin XLR Adapter x1

Neck Strap x4
POE Adapter x1

3/8 Mounting Screw x1

Crab Clamp for RU51 x1

RJ45 to Dual XLR Cable x1

Hard-Shall Carry Case x1

RJ45 to XLR Cable x1

AC Power Cable x2

USB-A to USB-C Cable x1

User Manual x1

Warranty Card x1

Upgrade
Your Setup
Specifications
Interface
POE interface (RJ45)
Power supply interface (RJ45)
4-wire audio interface
2-wire audio interface
USB interfacePower Supply
POE power supply
NP-F batteryFrequency Response
150Hz-7kHz
Signal-to-Noise Ratio
>55dB
Distortion
<1%
LOS Range
1,300ft (400m)
Frequency Band
1.9GHz
Modulation Mode
GFSK
TX Power
<21dBm
RX Sensitivity
≤-93dBm
Bandwidth
1.728MHz
Power Consumption
P<3W
Dimensions
(L x W x H): 255.5mm x 180.4mm x 48.5mm
(10″ x 7.1″ x 1.9″)Net Weight
Approx. 1560g (55oz)
ENC Level
/
Temperature Range
0℃ to 45℃ (working condition)
-20℃ to 60℃ (storage condition)
Interface
3.5mm headset interface
0B10 headset interface
USB-C interfacePower Supply
1500mAh lithium polymer battery
Frequency Response
ENC OFF: 200Hz-7kHz (fluctuation range: ±6dB)
ENC ON: 200Hz-7kHz (fluctuation range: ±10dB)Signal-to-Noise Ratio
60dB±2
Distortion
<1%
LOS Range
1,300ft (400m)
Frequency Band
1.9GHz
Modulation Mode
GFSK
TX Power
<21dBm
RX Sensitivity
≤-93dBm
Bandwidth
1.728MHz
Power Consumption
<0.65W
Dimensions
(L x W x H): 105mm x 65mm x 22.4mm
(4.13″ x 2.56″ x 0.88″)Net Weight
Approx. 200g (7oz)
ENC Level
20dB
Temperature Range
0℃ to 45℃ (working condition)
-20℃ to 60℃ (storage condition)








