United States$5,000,000+
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Brandon Langdon
5
Dual-ear QD headset with exceptional noise cancellation.
2489-820-209
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JABRA BIZ 2400 II DUO NC IP QD
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2489-820-209
- Description:
- JABRA BIZ 2400 II DUO NC IP QD
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- Brand:
- Jabra
- Condition:
3 Year Extended Warranty
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2489-820-209 Overview
2489-820-209-JABRA BIZ 2400 II DUO NC IP QD is a professional-grade wired headset engineered for high-performance voice communications in unified communications (UC) environments. Designed as a dual-ear (duo) headset with noise-cancelling (NC) condenser microphones, it utilizes a Quick Disconnect (QD) interface for flexible integration with desk phones, softphones, or contact center solutions via compatible adapters. The wideband audio headset delivers superior sound clarity and effective noise suppression with a typical frequency response of 80 Hz – 16 kHz, ensuring natural-sounding conversations. It is not equipped with onboard amplification—rather, it is powered via external telephony or UC devices through passive connectivity.
Supporting Digital Signal Processing (DSP) for advanced call clarity and acoustic shock protection, the JABRA BIZ 2400 II DUO NC IP QD is optimized for busy office environments, call centers, and VoIP-enabled boardrooms. The headset is compatible with leading AV systems and unified communications platforms. It is ideal for deployment in professional meeting spaces, large-scale UC rollouts, and contact center workstations where clear bi-directional voice transmission and long-wearing comfort are paramount. Ergonomic design features, including a Kevlar-reinforced cable and lightweight materials, make it suitable for prolonged daily use.
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2489-820-209 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 / Contact Center
- Channel Configuration
- Stereo
- 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
- 80 Hz – 16 kHz
- Signal Processing
- DSP / Noise Suppression
- Audio Codecs Supported
- N/A
- Mounting Option
- N/A
- Control Interface
- Physical Buttons
- Wireless Support
- No
- Product Name
- Jabra BIZ 2400 II Duo NC IP QD (2489-820-209)
- Height
- 6.5
- Width
- 6.6
- Depth
- 2.0
- Weight
- 0.13
Quality Certifications
To get the detailed certification, please go to the Compliance Center.
Product Comparison Table 
| 2489-820-209 |  4999-829-209 |  26599-899-989 |  6593-829-409 |  26599-999-999 | |
|---|---|---|---|---|---|
| Product Type | Audio Equipment | Audio Equipment | Audio Equipment | Audio Equipment | Audio Equipment |
| Audio Device Type | Headset | Headset | Headset | Headset | Headset |
| Microphone Type | Condenser | Condenser | MEMS | Dynamic | Condenser |
| Speaker Type | N/A | N/A | Active | Active | Active |
| Form Factor | Desktop | Desktop | Portable | Portable | Portable |
| Use Case | Unified Communications / Conference Room / Contact Center | Unified Communications / Conference Room / Office | Unified Communications | Unified Communications / Conference Room / Office | Conference Room / Unified Communications / Meeting Space / Remote Work |
| Channel Configuration | Stereo | Stereo | Mono | Mono | Stereo |
| Connectivity | Quick Disconnect (QD) | USB | USB / Bluetooth | USB / Bluetooth | USB / Bluetooth |
| Input Types | N/A | USB | USB / Bluetooth | USB / Bluetooth | USB / Bluetooth / N/A |
| Output Types | Quick Disconnect (QD) | USB | Speaker Terminal | Speaker / 3.5mm | USB / Bluetooth / 3.5mm |
| Power Output (if applicable) | N/A | N/A | N/A | N/A | N/A |
| Power Source | N/A | USB-Powered | Battery / USB-Powered | USB-Powered / Battery | Battery / USB-Powered |
| Frequency Response | 80 Hz – 16 kHz | 150 Hz – 7 kHz | 20 Hz – 20 kHz (Speaker), 100 Hz – 8 kHz (Microphone) | 100 Hz – 10 kHz (Speaker), 150 Hz – 6.8 kHz (Microphone) | 20 Hz – 20 kHz |
| Signal Processing | DSP / Noise Suppression | DSP / Noise Suppression | DSP / AEC / Noise Suppression | DSP / Noise Suppression | DSP / AEC / Noise Suppression |
| Audio Codecs Supported | N/A | N/A | SBC | SBC | SBC / AAC |
| Mounting Option | N/A | N/A | Desktop / Floor Stand | N/A | Desktop / N/A |
| Control Interface | Physical Buttons | Physical Buttons | Physical Buttons | Physical Buttons | Physical Buttons / App |
| Wireless Support | No | No | Bluetooth | Bluetooth | Bluetooth |
| Product Name | Jabra BIZ 2400 II Duo NC IP QD (2489-820-209) | Jabra Evolve 20 UC Stereo (4999-829-209) | Jabra Evolve2 65 Link380a MS Mono Stand Black | Jabra Evolve 65 UC mono - Headset (6593-829-409) | Jabra Evolve2 65 Link380a MS Stereo Black |
| Height | 6.5 | 7.0 | 6.38 | 6.73 | 7.32 |
| Width | 6.6 | 6.0 | 7.68 | 6.77 | 6.42 |
| Depth | 2.0 | 2.0 | 2.68 | 2.28 | 2.68 |
| Weight | 0.13 | 0.25 | 0.35 | 0.2 | 0.42 |
Reviews & Ratings
J
Jordan Whitestone
5
Clear conversations without distortion in high-volume environments.
N
Nathan Fairbanks
5
Durable design supporting demanding call center use.
C
Carter Lockwood
5
Comfortable headband and dependable audio clarity.
G
Gavin Thornton
5
Reliable enterprise headset for structured deployments.
Questions & Answers
What is the Jabra Biz 2400 II Duo NC IP QD?
The Jabra Biz 2400 II Duo NC IP QD is a professional corded stereo headset designed for high-noise environments with advanced noise-canceling mic and Quick Disconnect connectivity for IP desk phones.
What are the key features of the Jabra Biz 2400 II Duo NC IP QD?
Key features include ultra-noise-canceling dual-membrane microphone, flexible boom arm, reinforced steel headband, leatherette ear cushions and a Quick Disconnect (QD) connector for seamless desk phone integration.
How does the noise-canceling microphone work on the Jabra Biz 2400 II Duo NC IP QD?
The dual-membrane noise-canceling microphone filters out background noise by capturing voice from one side and ambient sound from the other, ensuring crystal-clear transmission.
Is the Jabra Biz 2400 II Duo NC IP QD compatible with IP desk phones?
Yes, it is certified for major IP desk phone systems and delivers plug-and-play setup via the QD interface with compatible phone adapters.
What does the QD connector mean on the Jabra Biz 2400 II Duo NC IP QD?
Quick Disconnect (QD) is a modular plug that lets you detach your headset from the handset cable or amplifier without tools, enabling easy mobile transitions.
What wearing styles does the Jabra Biz 2400 II Duo NC IP QD offer?
This model features a duo (binaural) wearing style with a self-adjusting headband and leatherette ear cushions for secure, comfortable stereo listening.
Can I replace parts on the Jabra Biz 2400 II Duo NC IP QD?
Yes, all critical components—ear cushions, headband, mic foam and cables—are user-replaceable to extend longevity and hygiene.
How long is the cable on the Jabra Biz 2400 II Duo NC IP QD?
The headset includes a 1.5 m (4.9 ft) cable to the QD plug and an additional 1 m (3.3 ft) pigtail to the desk phone adapter.
What is the warranty for the Jabra Biz 2400 II Duo NC IP QD?
The headset is backed by a two-year manufacturer’s warranty covering defects in materials and workmanship.
How do I maintain and clean the Jabra Biz 2400 II Duo NC IP QD?
Clean ear cushions and mic foam regularly with a mild disinfectant wipe, allow to dry fully, and replace parts when wear or hygiene concerns arise.
Does the Jabra Biz 2400 II Duo NC IP QD support wideband audio?
Yes, it supports wideband audio up to 6,800 Hz (HD Voice) for natural, intelligible speech clarity.
Is the headband adjustable on the Jabra Biz 2400 II Duo NC IP QD?
Yes, the steel-reinforced headband features self-adjusting sliders for a personalized, comfortable fit on any head size.
How durable is the Jabra Biz 2400 II Duo NC IP QD for call center use?
Designed with reinforced components and Kevlar-strengthened cables, it withstands daily heavy-use in demanding call center environments.
Can I use the Jabra Biz 2400 II Duo NC IP QD in noisy environments?
Absolutely, the ultra-noise-canceling mic and enveloping leatherette ear pads block ambient noise, ensuring clear calls in loud offices.
What does IP stand for in the Jabra Biz 2400 II Duo NC IP QD name?
In this model name, IP denotes Internet Protocol, indicating optimized compatibility with IP-based desk phone systems.