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Exceptional dual-ear clarity with strong background noise suppression.
2409-820-204
Jabra BIZ 2400 II QD Duo NC - Headset (2409-820-204)
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2409-820-204
Jabra BIZ 2400 II QD Duo NC - Headset (2409-820-204)
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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 |  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 |
Exceptional dual-ear clarity with strong background noise suppression.
Comfortable headband and durable professional construction.
Consistent audio balance during high-volume calls.
Reliable QD connection across multiple desk phones.
Professional-grade performance in call center operations.
Clear conversations without interference or distortion.
Trusted headset for enterprise communication setups.
It is a professional-grade noise-canceling, Quick Disconnect, stereo headset engineered for call center excellence, offering superior audio clarity and robust build quality.
It features a premium noise-canceling microphone that suppresses background noise for crystal-clear voice transmission in busy environments.
The Quick Disconnect cable enables fast, tool-free connection and disconnection from compatible desk phones, allowing seamless user mobility without removing the headset.
No. The Duo model provides dual-ear speakers for stereo listening and is designed for optimal call focus and comfort without mono switching.