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Name:
2406-720-209
- Description:
- JABRA BIZ 2400 II MONO 3-1 UNC QD
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3 Year Extended Warranty
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Standard ground delivery across the U.S. takes 2–6 days, depending on your location — no extra charge.
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For all international orders, we ship via your UPS, FedEx, or DHL account — or to your U.S.-based freight forwarder.
Delivery Timelines
Under 100 KG? Ships Express.
Smaller shipments go via DHL or FedEx Express — delivered worldwide in approximately 3 business days.
Over 100 KG? Ships via Freight.
Larger orders are dispatched through freight forwarding partners. Delivery takes 7–10 business days, globally.
Always Delivered to Your Door
Every shipment is delivered directly to your address — regardless of country or carrier.
Our best-in-class warranties
3-Year Extended Warranty
Extended protection, enterprise-grade.
All enterprise hardware is backed by a 3-year warranty — triple the industry standard — covering defects under normal use.
Professional repairs & replacements.
If a hardware issue is confirmed, we’ll repair or replace the unit. Replacement parts carry either original or 3-month coverage.
RMA process, simplified.
Once an RMA is approved, return the defective unit within 10 days. We handle the rest — no service gaps.
Service Boundaries & Exclusions
What’s covered — and what’s best avoided.
Your warranty covers defects under normal use. For continued protection, avoid accidental damage, unauthorized repairs, third-party parts, or extreme environments.
Know your location’s service type.
In some regions, return-to-factory or remote service may apply. On-site service depends on infrastructure availability.
Minimal documentation required.
To initiate service, just submit the invoice and warranty card — no red tape, no waiting.
14-Day Money Back Guarantee
Free 14-Day Returns
Tested it, but it’s not a fit?
Return any product within 14 days of delivery if it doesn’t meet your technical or operational needs.
Initiate returns with ease.
Our RMA process is streamlined — just raise a request, follow the packaging guidelines, and we’ll handle the rest.
Refund or restock, your call.
Changed your mind? Get a refund (restocking fees may apply) or swap with another product.
30-Day Hardware Replacement
Covered for any early faults.
All equipment includes a 30-day replacement warranty. If something goes wrong, we’ll repair or swap it — fast.
Replacements shipped in 10 days or less.
Once your return is inspected and approved, we dispatch the replacement promptly to keep your operations moving.
RMA protocol keeps it smooth.
Just ensure all accessories and original packaging are intact — we’ll take care of the technical validation.
TRUSTED, TRIED, PROVEN
2406-720-209 Overview
2406-720-209-JABRA BIZ 2400 II MONO 3-1 UNC QD is a professional-grade mono headset designed for unified communications and contact center environments. As a headset, it features a high-quality condenser microphone with noise-cancelling capabilities and wideband audio for crystal-clear voice transmission. The audio configuration is mono, supporting single-ear listening while enabling situational awareness in professional settings.
This headset connects via Quick Disconnect (QD) for compatibility with various desk phones and supported audio devices within enterprise AV and UC systems. With a frequency response optimized for speech (100 Hz – 10 kHz), it provides reliable performance for conferencing, customer service, and office deployments. The Jabra BIZ 2400 II MONO 3-1 UNC QD is engineered for durability, all-day comfort, and flexibility in busy boardrooms, contact centers, and professional meeting spaces.
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Explore more options from Audio Equipment or explore other Jabra products.
2406-720-209 Specifications
| Product Type | Audio Equipment |
| Audio Device Type | Headset |
| Microphone Type | Condenser |
| Speaker Type | N/A |
| Form Factor | Desktop |
| Use Case | Unified Communications / Conference Room / Call Center |
| Channel Configuration | Mono |
| Connectivity | Quick Disconnect (QD) |
| Input Types | N/A |
| Output Types | Quick Disconnect (QD) |
| Power Output (if Applicable) | N/A |
| Power Source | N/A |
| Frequency Response | 100 Hz – 10 kHz |
| Signal Processing | Noise Suppression |
| Audio Codecs Supported | N/A |
| Mounting Option | N/A |
| Control Interface | Physical Buttons |
| Wireless Support | No |
| Product Name | Jabra BIZ 2400 II Mono 3-1 UNC QD (2406-720-209) |
| Height | 6.89 |
| Width | 6.89 |
| Depth | 2.17 |
| Weight | 0.11 |
Quality Certifications
To get the detailed certification, please go to the Compliance Center.
Product Comparison Table
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| Audio Codecs Supported | N/A | N/A | N/A | N/A | N/A |
| Audio Device Type | Headset | Headset | Headset | Headset | Headset |
| Channel Configuration | Mono | Stereo | Mono | Stereo | Mono |
| Connectivity | USB / Bluetooth / DECT | USB / Bluetooth | Bluetooth / USB | USB / 3.5mm | Quick Disconnect (QD) |
| Control Interface | Physical Buttons / Touchscreen (on base) | Physical Buttons | Physical Buttons | Physical Buttons | Physical Buttons |
| Depth | 2.6 | 2.3 | 0.95 in | 2.11 | 2.17 |
| Form Factor | Portable | Portable | Portable | Portable | Desktop |
| Frequency Response | Speaker: 40 Hz – 16 kHz; Microphone: 100 Hz – 7 kHz | 20 Hz – 20 kHz | 100 Hz – 15 kHz | 20 Hz – 20 kHz (Speakers), 100 Hz – 10 kHz (Microphone) | 100 Hz – 10 kHz |
| Height | 6.5 | 6.7 | 2.57 in | 6.89 | 6.89 |
| Input Types | USB / Bluetooth / DECT | USB / Bluetooth | USB / Bluetooth | USB / 3.5mm | N/A |
| Microphone Type | Condenser | Condenser | Condenser | Condenser | Condenser |
| Mounting Option | Desktop | N/A | N/A | N/A | N/A |
| Output Types | USB / Bluetooth / DECT | USB / Bluetooth | Bluetooth / USB | USB / 3.5mm | Quick Disconnect (QD) |
| Power Output (if applicable) | N/A | N/A | N/A | N/A | N/A |
| Power Source | Battery | USB-Powered / Battery | Battery / USB-Powered | USB-Powered | N/A |
| Product Name | Jabra Engage 75 Mono - Headset (9556-583-111) | Evolve 65 MS Stereo | Jabra Stealth UC Bluetooth Mono Headset (5578-230-109) | Jabra EVOLVE 30 II UC DUO | Jabra BIZ 2400 II Mono 3-1 UNC QD (2406-720-209) |
| Product Type | Audio Equipment | Audio Equipment | Audio Equipment | Audio Equipment | Audio Equipment |
| Signal Processing | DSP / AEC / Noise Suppression | DSP / Noise Suppression | DSP / AEC / Noise Suppression | DSP / Noise Suppression | Noise Suppression |
| Speaker Type | Active | N/A | N/A | N/A | N/A |
| Use Case | Conference Room / Unified Communications / Meeting Spaces / Offices / Call Centers | Unified Communications / Conference Room / Office / Call Center | Unified Communications / Conference Room / Office | Unified Communications | Unified Communications / Conference Room / Call Center |
| Weight | 0.153 | 0.31 | 0.28 lbs | 0.28 | 0.11 |
| Width | 6.7 | 6.1 | 0.61 in | 5.75 | 6.89 |
| Wireless Support | DECT / Bluetooth | Bluetooth | Bluetooth | No | No |
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Questions & Answers
Q
What devices are compatible with the Jabra Biz 2400 II Mono 3-1 UNC QD headset?
A
The Jabra Biz 2400 II Mono 3-1 UNC QD works with most desk phones, PCs, and mobile devices when paired with the included 3-in-1 UNC cable and Quick Disconnect (QD) connector.
Q
How does the 3-in-1 UNC cable function?
A
The 3-in-1 UNC cable integrates RJ9 (4-pin), 3.5 mm and 2.5 mm connectors, enabling seamless switching between desk phones, smartphones and tablets without additional adapters.
Q
What is the Quick Disconnect (QD) feature?
A
Quick Disconnect lets you detach the headset from its cable in seconds, facilitating easy call transfers and stowing without unplugging from your device.
Q
Does the Jabra Biz 2400 II Mono offer noise cancellation?
A
Yes, its ultra-noise-cancelling microphone filters background noise, ensuring crystal-clear voice quality even in busy office environments.
Q
Can I use this headset with PC softphones?
A
Yes, by connecting the 3-in-1 UNC cable to your PC’s audio jack or USB adapter, you can use it with Skype for Business, Zoom, Microsoft Teams and other VoIP applications.
Q
How long is the headset cable?
A
The total cable length from headset to QD jack is 1.5 m (4.9 ft), providing ample reach for desktop and commute use when combined with your own device cord or adapter.
Q
What warranty does Jabra provide for this headset?
A
Jabra offers a two-year manufacturer’s warranty covering defects in materials and workmanship for the Jabra Biz 2400 II Mono series.
Q
How do I adjust the headband for a secure fit?
A
Slide the headband arms up or down to customize tension; the flexible steel core automatically conforms to your head shape for all-day comfort.
Q
Is this headset comfortable for extended use?
A
Yes, the lightweight design (approx. 25 g) and soft leatherette ear cushion ensure fatigue-free wear over long shifts.
Q
Can I replace the ear cushion and foam mic cover?
A
Replacement ear cushions and wind-resistant foam mic covers are available as accessories, extending product lifespan and hygiene.
Q
How do I clean the Jabra Biz 2400 II Mono headset?
A
Wipe ear cushions and headband with a soft, lint-free cloth dampened in mild soap solution; avoid harsh chemicals to protect materials.
Q
What microphone pattern does this headset use?
A
It features a uni-directional noise-cancelling microphone that picks up voice from one direction, reducing surrounding distractions.
Q
Can I use the headset with a mobile phone?
A
Yes, connect the 2.5 mm or 3.5 mm plug of the 3-in-1 UNC cable directly to a smartphone’s audio jack for call handling on the go.
Q
How do I troubleshoot audio issues?
A
Check all connections—headset to QD, QD to device—ensure volume settings are up and test with another compatible device or cable.
Q
Does the headset support inline call controls?
A
No, the Jabra Biz 2400 II Mono 3-1 UNC QD is a basic QD model without built-in call controls; use your device’s controls instead.
Q
Where can I buy replacement cables or accessories?
A
Jabra-authorized resellers and the official Jabra online store stock replacement 3-in-1 UNC cables, ear cushions, mic covers and QD adapters.
