United States$5,000,000+
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Lucian Bradford
4
High-quality mono QD headset with strong noise suppression.
2406-820-204
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Biz 2400 II QD Mono NC 3 in 1 - Headset - Head-band - Office...
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2406-820-204
- Description:
- Biz 2400 II QD Mono NC 3 in 1 - Headset - Head-band - Office/Call center - Black - Silver - Monaural - China
- Rating:
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- Brand:
- Jabra
- Condition:
3 Year Extended Warranty
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2406-820-204 Overview
2406-820-204-Biz 2400 II QD Mono NC 3 in 1 - Headset - Head-band - Office/Call center - Black - Silver - Monaural - China is a professional-grade monaural headset designed for high-demand office and call center environments. This headset integrates a single-ear speaker with a noise-cancelling condenser microphone and a durable head-band construction, delivering clear audio output and reliable voice input during extended use. The 3-in-1 wearing style provides flexibility for various user preferences and all-day comfort.
The headset utilizes a Quick Disconnect (QD) cable for connectivity, supporting seamless integration with desk phones, unified communications, and contact center systems that are compatible with QD standards. It offers a frequency response of 100 Hz to 10 kHz for speech-optimized clarity, and features advanced noise-cancelling (NC) technology for productive communication in shared workspaces. Ideal for office, call center, and unified communications deployments, this headset supports streamlined workflows and high-quality audio in busy professional settings.
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2406-820-204 Specifications
- Product Type
- Audio Equipment
- Audio Device Type
- Headset
- Microphone Type
- Condenser
- Speaker Type
- N/A
- Form Factor
- Head-band
- Use Case
- Unified Communications / Conference Room / Office / Call Center
- Channel Configuration
- Mono
- Connectivity
- Quick Disconnect (QD)
- Input Types
- Quick Disconnect (QD)
- Output Types
- Quick Disconnect (QD)
- Power Output (if applicable)
- N/A
- Power Source
- N/A
- Frequency Response
- 100 Hz – 10 kHz
- Signal Processing
- Noise Suppression
- Audio Codecs Supported
- N/A
- Mounting Option
- N/A
- Control Interface
- Physical Buttons
- Wireless Support
- No
- Product Name
- 2406-820-204-Biz 2400 II QD Mono NC 3 in 1
- Height
- 6.89
- Width
- 5.91
- Depth
- 2.36
- Weight
- 0.14
Quality Certifications
To get the detailed certification, please go to the Compliance Center.
Product Comparison Table 
| 2406-820-204 |  930-29-503-101 |  6593-829-409 |  24089-989-999 |  7599-838-199 | |
|---|---|---|---|---|---|
| Product Type | Audio Equipment | Audio Equipment | Audio Equipment | Audio Equipment | Audio Equipment |
| Audio Device Type | Headset | Headset | Headset | Headset | Headset |
| Microphone Type | Condenser | Condenser | Dynamic | Condenser | Condenser |
| Speaker Type | N/A | N/A | Active | N/A | Active |
| Form Factor | Head-band | Desktop | Portable | Portable | Portable |
| Use Case | Unified Communications / Conference Room / Office / Call Center | Unified Communications / Conference Room / Office | Unified Communications / Conference Room / Office | Unified Communications / Conference Room / Streaming / Broadcast / Remote Work | Unified Communications |
| Channel Configuration | Mono | Stereo | Mono | Stereo | Stereo |
| Connectivity | Quick Disconnect (QD) | USB | USB / Bluetooth | USB | USB / Bluetooth |
| Input Types | Quick Disconnect (QD) | USB | USB / Bluetooth | USB | USB / Bluetooth |
| Output Types | Quick Disconnect (QD) | USB | Speaker / 3.5mm | USB | 3.5mm / Bluetooth |
| Power Output (if applicable) | N/A | N/A | N/A | N/A | N/A |
| Power Source | N/A | USB-Powered | USB-Powered / Battery | USB-Powered | Battery / USB-Powered |
| Frequency Response | 100 Hz – 10 kHz | 150 Hz – 6.8 kHz (speaker), 150 Hz – 7 kHz (microphone) | 100 Hz – 10 kHz (Speaker), 150 Hz – 6.8 kHz (Microphone) | 20 Hz – 20 kHz (Speaker), 100 Hz – 14 kHz (Microphone) | 20 Hz – 20 kHz (music), 150 Hz – 6.8 kHz (calls) |
| Signal Processing | Noise Suppression | DSP / AEC / Noise Suppression | DSP / Noise Suppression | DSP / AEC / Noise Suppression | DSP / AEC / Noise Suppression / AGC |
| Audio Codecs Supported | N/A | N/A | SBC | N/A | SBC |
| Mounting Option | N/A | N/A | N/A | N/A | N/A |
| Control Interface | Physical Buttons | Physical Buttons | Physical Buttons | Physical Buttons | Physical Buttons |
| Wireless Support | No | No | Bluetooth | No | Bluetooth |
| Product Name | 2406-820-204-Biz 2400 II QD Mono NC 3 in 1 | 930-29-503-101-PRO 930 Duo MS - Headset - Head-band - Office/Call center - Black - Binaural - China | Jabra Evolve 65 UC mono - Headset (6593-829-409) | Jabra Evolve2 40 UC Stereo - Headset (24089-989-999) | Jabra Evolve 75 UC Stereo Headset Head-band Bluetooth Black (7599-838-199) |
| Height | 6.89 | 6.89 | 6.73 | 2.25 | 6.89 |
| Width | 5.91 | 6.77 | 6.77 | 6.37 | 7.09 |
| Depth | 2.36 | 2.36 | 2.28 | 7.68 | 2.32 |
| Weight | 0.14 | 0.19 | 0.2 | 0.39 | 0.42 |
Reviews & Ratings
T
Talon Whitlock
4
Reliable desk phone compatibility and clear audio.
B
Bridger Holloway
5
Comfortable for extended support shifts.
I
Ismael Reeves
4
Durable construction suited for busy call centers.
Z
Zane Talbot
4
Consistent voice clarity across devices.
K
Kade Piercefield
5
Professional mono performance in enterprise environments.
C
Cyrus Bradford
4
Trusted communication tool for daily operations.
Questions & Answers
What key features define the Plantronics Biz 2400 II QD Mono NC 3-in-1 headset?
The Biz 2400 II QD Mono NC 3-in-1 headset offers an adjustable headband, superior noise-canceling microphone, QD (quick disconnect) connection, and three wearing styles (headband, earhook, and over-the-ear).
How effective is the noise-canceling microphone on this headset?
The advanced noise-canceling microphone filters out up to 95% of background noise, ensuring clear voice transmission in busy office or call-center environments.
Which devices are compatible with the QD connection?
The quick-disconnect (QD) cable is compatible with most desk phones equipped with QD ports and can be used with USB or 3.5 mm adapters for softphone and mobile device integration.
Can I switch between wearing styles without tools?
Yes, the 3-in-1 design allows tool-free conversion between headband, earhook, and over-the-ear wearing styles for personalized comfort.
What is the wearing comfort for all-day use?
The lightweight design (< 31 g) combined with an adjustable padded headband and soft leatherette ear cushion ensures all-day comfort during extended calls.
How do I connect this headset to a computer or softphone?
Use the QD-to-USB adapter (sold separately) to plug directly into your computer’s USB port and install the Plantronics software for call controls.
Is the Biz 2400 II suitable for noisy call-center environments?
Yes, its ultra-noise-canceling microphone and acoustic shock protection make it ideal for high-noise call-center settings.
What warranty does this headset include?
The Biz 2400 II comes with a two-year manufacturer’s warranty covering defects in materials and workmanship.
How durable is the headset for daily office use?
Constructed with reinforced steel and military-grade materials, the headset withstands daily wear and tear in demanding office environments.
Does the headset support inline call controls?
Inline call controls are available via optional QD-to-USB or QD-to-4-pin handset adapters, enabling call answer/end and volume adjustment.
What languages is the headset manual available in?
The user manual is provided in multiple languages, including English, Spanish, French, German, and Chinese, to support global customers.
How do I clean and maintain the ear cushions?
Wipe ear cushions with a soft, damp cloth and mild disinfectant weekly; replace cushions every 6–12 months for optimal hygiene.
Is the headset adjustable for left- or right-ear use?
Yes, the microphone boom and ear cushion rotate, accommodating both left- and right-ear wearing preferences.
What country is this headset manufactured in?
The Biz 2400 II QD Mono NC 3-in-1 headset is manufactured in China under strict quality control standards.
Does this headset offer acoustic shock protection?
Yes, integrated acoustic shock protection safeguards users from sudden loud sounds, ensuring a safe audio experience.
What is the recommended replacement cycle for consumable parts?
Plantronics recommends replacing ear cushions every 6–12 months and headbands every 12–18 months, depending on usage frequency.