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Dual-ear QD headset with exceptional noise cancellation.
2489-820-209
JABRA BIZ 2400 II DUO NC IP QD
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2489-820-209
JABRA BIZ 2400 II DUO NC IP QD
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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 |  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 |
Dual-ear QD headset with exceptional noise cancellation.
Clear conversations without distortion in high-volume environments.
Durable design supporting demanding call center use.
Comfortable headband and dependable audio clarity.
Reliable enterprise headset for structured deployments.
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.
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.
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.
Yes, it is certified for major IP desk phone systems and delivers plug-and-play setup via the QD interface with compatible phone adapters.