United States$5,000,000+
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Khaled Osborne
4
Exceptional dual-ear clarity with strong background noise suppression.
2409-820-204
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Jabra BIZ 2400 II QD Duo NC - Headset (2409-820-204)
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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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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.
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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 
| 2409-820-204 |  2499-829-309 |  2406-820-204 |  28599-999-999 |  4999-823-309 | |
|---|---|---|---|---|---|
| Product Type | Audio Equipment | Audio Equipment | Audio Equipment | Audio Equipment | Audio Equipment |
| Audio Device Type | Headset | Headset | Headset | Headset | Headset |
| Microphone Type | Condenser | Condenser | Condenser | Condenser | Noise-Cancelling / N/A |
| Speaker Type | N/A | N/A | N/A | Active | N/A |
| Form Factor | Portable | Portable | Head-band | Portable | Desktop |
| Use Case | Unified Communications / Conference Room / Call Center | Unified Communications / Conference Room / Call Center / Office | Unified Communications / Conference Room / Office / Call Center | Unified Communications / Conference Room / Streaming / Home Audio | Conference Room / Unified Communications / Meeting Space / Office |
| Channel Configuration | Stereo | Stereo | Mono | Stereo | Stereo |
| Connectivity | QD (Quick Disconnect) | USB | Quick Disconnect (QD) | USB / Bluetooth | USB |
| Input Types | QD (Quick Disconnect) | USB | Quick Disconnect (QD) | USB / Bluetooth | USB |
| Output Types | QD (Quick Disconnect) | USB | Quick Disconnect (QD) | USB / Bluetooth | USB |
| Power Output (if applicable) | N/A | N/A | N/A | N/A | N/A |
| Power Source | N/A | USB-Powered | N/A | Battery / USB-Powered | USB-Powered |
| Frequency Response | 100 Hz – 8 kHz (telephony) / 80 Hz – 16 kHz (multimedia) | 80 Hz – 18 kHz (Speaker), 100 Hz – 10 kHz (Microphone) | 100 Hz – 10 kHz | 20 Hz – 20 kHz | Microphone: 100 Hz – 10 kHz; Speakers: 150 Hz – 7 kHz |
| Signal Processing | DSP / Noise Suppression / PeakStop | DSP / Noise Suppression / AEC | Noise Suppression | DSP / AEC / Noise Suppression | DSP / Noise Suppression |
| Audio Codecs Supported | N/A | N/A | N/A | SBC / AAC | N/A |
| Mounting Option | N/A | Desktop | N/A | N/A | Desktop |
| Control Interface | Physical Buttons | Physical Buttons | Physical Buttons | Physical Buttons / App | Physical Buttons |
| Wireless Support | No | No | No | Bluetooth | No |
| Product Name | Jabra BIZ 2400 II QD Duo NC - Headset (2409-820-204) | Jabra Biz 2400 II USB Duo CC | 2406-820-204-Biz 2400 II QD Mono NC 3 in 1 | Jabra Evolve2 85 Link380A MS Stereo Black | Jabra Evolve 20 MS Stereo SE (4999-823-309) |
| Height | 6.7 | 6.89 | 6.89 | 3.1 | 6.85 |
| Width | 5.9 | 5.59 | 5.91 | 8.6 | 7.48 |
| Depth | 2.2 | 1.18 | 2.36 | 7.9 | 2.36 |
| Weight | 0.14 | 0.13 | 0.14 | 0.67 | 0.22 |
Reviews & Ratings
R
Rafael Talbot
5
Comfortable headband and durable professional construction.
D
Darren Salinas
4
Consistent audio balance during high-volume calls.
M
Matias Henson
5
Reliable QD connection across multiple desk phones.
E
Emilio Hart
4
Professional-grade performance in call center operations.
N
Nolan Piercefield
4
Clear conversations without interference or distortion.
T
Terrence Vaughn
4
Trusted headset for enterprise communication setups.
Questions & Answers
What is the Jabra BIZ 2400 II QD Duo NC headset?
It is a professional-grade noise-canceling, Quick Disconnect, stereo headset engineered for call center excellence, offering superior audio clarity and robust build quality.
What type of noise cancellation does this headset offer?
It features a premium noise-canceling microphone that suppresses background noise for crystal-clear voice transmission in busy environments.
How does the Quick Disconnect (QD) feature work?
The Quick Disconnect cable enables fast, tool-free connection and disconnection from compatible desk phones, allowing seamless user mobility without removing the headset.
Can I switch between mono and stereo on the Duo model?
No. The Duo model provides dual-ear speakers for stereo listening and is designed for optimal call focus and comfort without mono switching.
What devices is the Jabra BIZ 2400 II QD Duo NC compatible with?
It is compatible with most analog desk phones from Avaya, Cisco, Nortel, NEC and other leading PBX systems via the standard QD connection.
How does the microphone perform in noisy environments?
With its noise-canceling boom mic and precise voice pickup, it delivers consistent, distortion-free audio even in open-office or call-center settings.
What is the comfort level and fit?
Featuring ultra-soft foam ear cushions, an adjustable headband and a lightweight design under 100 g, it ensures all-day comfort during extended use.
How durable is the Jabra BIZ 2400 II QD Duo NC?
Built with Kevlar-reinforced cables and a metal-reinforced headband, it withstands daily wear and tear, delivering reliable performance over millions of movements.
What materials and design features ensure durability?
The headset incorporates Kevlar-reinforced fiber cables and a rugged stainless-steel headband, providing exceptional tensile strength and impact resistance.
How easy is it to replace ear cushions and microphone covers?
Replacement cushions and mic foams are user-installable within seconds, minimizing downtime and extending the headset’s service life.
What is the warranty period?
Jabra offers a 2-year warranty covering component defects and workmanship, ensuring long-term reliability and peace of mind.
How do I clean and maintain the headset?
Wipe ear cushions and the boom with a soft microfiber cloth and mild disinfectant; avoid harsh chemicals to preserve materials and hygiene.
What is the frequency range for audio quality?
The headset supports a wideband frequency range of 150 Hz–6,800 Hz, delivering clear voice reproduction and natural sound.
Does the headset support high-definition (HD) voice?
Yes. It is optimized for HD voice, enhancing call clarity and intelligibility on compatible telecom systems.
Does this headset support busy light indicators?
No. This QD analog model does not include a built-in busy light; presence signals are managed via your phone system or external accessories.
Is the headset optimized for all-day use in call centers?
Absolutely. Its ergonomic design, lightweight construction and superior audio quality make it ideal for prolonged, high-volume call center environments.