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2409-820-204
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- Jabra BIZ 2400 II QD Duo NC - Headset (2409-820-204)
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Our best-in-class warranties
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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.
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Your warranty covers defects under normal use. For continued protection, avoid accidental damage, unauthorized repairs, third-party parts, or extreme environments.
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In some regions, return-to-factory or remote service may apply. On-site service depends on infrastructure availability.
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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.
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2409-820-204 Overview
2409-820-204-Jabra BIZ 2400 II QD Duo NC - Headset (2409-820-204) is a professional-grade binaural headset designed for high-performance unified communications, call centers, and business environments. Featuring a noise-cancelling (NC) condenser microphone and dual speakers, this wired headset ensures crystal-clear audio input and output, making it ideal for environments where clear communication is paramount. It connects via QD (Quick Disconnect) for seamless integration with compatible desk phones and accessories and supports wideband audio with a frequency response of 100 Hz to 8 kHz for telephony and 80 Hz to 16 kHz for multimedia, delivering natural voice clarity.
The Jabra BIZ 2400 II QD Duo NC supports advanced signal processing such as DSP and peak stop technology, protecting users from sudden loud sounds. Its lightweight, adjustable design includes an unobtrusive headband and flexible boom arm, enhancing comfort during extended use. This headset is optimized for use in boardrooms, meeting spaces, UC deployments, and high-traffic call centers. Compatible with a broad range of desk phone audio systems via QD, it is not designed for USB, Bluetooth, or wireless connectivity, making it a reliable and robust choice for consistent, wired unified communications installations.
What is the price of 2409-820-204?
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Explore more options from Audio Equipment or explore other Jabra products.
2409-820-204 Specifications
| Product Type | Audio Equipment |
| Audio Device Type | Headset |
| Microphone Type | Condenser |
| Speaker Type | N/A |
| Form Factor | Portable |
| Use Case | Unified Communications / Conference Room / Call Center |
| Channel Configuration | Stereo |
| Connectivity | QD (Quick Disconnect) |
| Input Types | QD (Quick Disconnect) |
| Output Types | QD (Quick Disconnect) |
| Power Output (if Applicable) | N/A |
| Power Source | N/A |
| Frequency Response | 100 Hz – 8 kHz (telephony) / 80 Hz – 16 kHz (multimedia) |
| Signal Processing | DSP / Noise Suppression / PeakStop |
| Audio Codecs Supported | N/A |
| Mounting Option | N/A |
| Control Interface | Physical Buttons |
| Wireless Support | No |
| Product Name | Jabra BIZ 2400 II QD Duo NC - Headset (2409-820-204) |
| Height | 6.7 |
| Width | 5.9 |
| Depth | 2.2 |
| Weight | 0.14 |
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 | SBC / AAC |
| Audio Device Type | Headset | Headset | Headset | Headset | Headset |
| Channel Configuration | Stereo | Stereo | Stereo | Mono | Stereo |
| Connectivity | USB | USB | QD (Quick Disconnect) | Quick Disconnect (QD) | USB / Bluetooth |
| Control Interface | Physical Buttons | Physical Buttons | Physical Buttons | Physical Buttons | Physical Buttons / App |
| Depth | 2.36 | 1.18 | 2.2 | 2.36 | 7.9 |
| Form Factor | Desktop | Portable | Portable | Head-band | Portable |
| Frequency Response | Microphone: 100 Hz – 10 kHz; Speakers: 150 Hz – 7 kHz | 80 Hz – 18 kHz (Speaker), 100 Hz – 10 kHz (Microphone) | 100 Hz – 8 kHz (telephony) / 80 Hz – 16 kHz (multimedia) | 100 Hz – 10 kHz | 20 Hz – 20 kHz |
| Height | 6.85 | 6.89 | 6.7 | 6.89 | 3.1 |
| Input Types | USB | USB | QD (Quick Disconnect) | Quick Disconnect (QD) | USB / Bluetooth |
| Microphone Type | Noise-Cancelling / N/A | Condenser | Condenser | Condenser | Condenser |
| Mounting Option | Desktop | Desktop | N/A | N/A | N/A |
| Output Types | USB | USB | QD (Quick Disconnect) | Quick Disconnect (QD) | USB / Bluetooth |
| Power Output (if applicable) | N/A | N/A | N/A | N/A | N/A |
| Power Source | USB-Powered | USB-Powered | N/A | N/A | Battery / USB-Powered |
| Product Name | Jabra Evolve 20 MS Stereo SE (4999-823-309) | Jabra Biz 2400 II USB Duo CC | Jabra BIZ 2400 II QD Duo NC - Headset (2409-820-204) | 2406-820-204-Biz 2400 II QD Mono NC 3 in 1 | Jabra Evolve2 85 Link380A MS Stereo Black |
| Product Type | Audio Equipment | Audio Equipment | Audio Equipment | Audio Equipment | Audio Equipment |
| Signal Processing | DSP / Noise Suppression | DSP / Noise Suppression / AEC | DSP / Noise Suppression / PeakStop | Noise Suppression | DSP / AEC / Noise Suppression |
| Speaker Type | N/A | N/A | N/A | N/A | Active |
| Use Case | Conference Room / Unified Communications / Meeting Space / Office | Unified Communications / Conference Room / Call Center / Office | Unified Communications / Conference Room / Call Center | Unified Communications / Conference Room / Office / Call Center | Unified Communications / Conference Room / Streaming / Home Audio |
| Weight | 0.22 | 0.13 | 0.14 | 0.14 | 0.67 |
| Width | 7.48 | 5.59 | 5.9 | 5.91 | 8.6 |
| Wireless Support | No | No | No | No | Bluetooth |
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Questions & Answers
Q
What is the Jabra BIZ 2400 II QD Duo NC headset?
A
It is a professional-grade noise-canceling, Quick Disconnect, stereo headset engineered for call center excellence, offering superior audio clarity and robust build quality.
Q
What type of noise cancellation does this headset offer?
A
It features a premium noise-canceling microphone that suppresses background noise for crystal-clear voice transmission in busy environments.
Q
How does the Quick Disconnect (QD) feature work?
A
The Quick Disconnect cable enables fast, tool-free connection and disconnection from compatible desk phones, allowing seamless user mobility without removing the headset.
Q
Can I switch between mono and stereo on the Duo model?
A
No. The Duo model provides dual-ear speakers for stereo listening and is designed for optimal call focus and comfort without mono switching.
Q
What devices is the Jabra BIZ 2400 II QD Duo NC compatible with?
A
It is compatible with most analog desk phones from Avaya, Cisco, Nortel, NEC and other leading PBX systems via the standard QD connection.
Q
How does the microphone perform in noisy environments?
A
With its noise-canceling boom mic and precise voice pickup, it delivers consistent, distortion-free audio even in open-office or call-center settings.
Q
What is the comfort level and fit?
A
Featuring ultra-soft foam ear cushions, an adjustable headband and a lightweight design under 100 g, it ensures all-day comfort during extended use.
Q
How durable is the Jabra BIZ 2400 II QD Duo NC?
A
Built with Kevlar-reinforced cables and a metal-reinforced headband, it withstands daily wear and tear, delivering reliable performance over millions of movements.
Q
What materials and design features ensure durability?
A
The headset incorporates Kevlar-reinforced fiber cables and a rugged stainless-steel headband, providing exceptional tensile strength and impact resistance.
Q
How easy is it to replace ear cushions and microphone covers?
A
Replacement cushions and mic foams are user-installable within seconds, minimizing downtime and extending the headset’s service life.
Q
What is the warranty period?
A
Jabra offers a 2-year warranty covering component defects and workmanship, ensuring long-term reliability and peace of mind.
Q
How do I clean and maintain the headset?
A
Wipe ear cushions and the boom with a soft microfiber cloth and mild disinfectant; avoid harsh chemicals to preserve materials and hygiene.
Q
What is the frequency range for audio quality?
A
The headset supports a wideband frequency range of 150 Hz–6,800 Hz, delivering clear voice reproduction and natural sound.
Q
Does the headset support high-definition (HD) voice?
A
Yes. It is optimized for HD voice, enhancing call clarity and intelligibility on compatible telecom systems.
Q
Does this headset support busy light indicators?
A
No. This QD analog model does not include a built-in busy light; presence signals are managed via your phone system or external accessories.
Q
Is the headset optimized for all-day use in call centers?
A
Absolutely. Its ergonomic design, lightweight construction and superior audio quality make it ideal for prolonged, high-volume call center environments.
