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QD duo headset with reliable clarity and strong build quality.
2309-825-109
Biz 2300 QD Duo Siemens - Headset - Head-band - Office/Call...
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2309-825-109
Biz 2300 QD Duo Siemens - Headset - Head-band - Office/Call...
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2309-825-109-Biz 2300 QD Duo Siemens - Headset - Head-band - Office/Call center - Black - Binaural - 1.075 m is a professional-grade wired binaural headset designed specifically for use in high-performance office and call center environments. Featuring a comfortable headband form factor and dual earpieces, this headset delivers stereo audio output for clear conversations and superior noise isolation, making it ideal for Unified Communications (UC), call handling, and conferencing workflows where productivity and clarity are essential.
This model connects via Quick Disconnect (QD) interface for reliable plug-and-play connectivity with Siemens telephony systems and select compatible desk phones. The Biz 2300 QD Duo integrates a noise-canceling condenser microphone optimized for voice communications, supports a frequency response of 100 Hz – 10 kHz for wideband audio, and leverages digital signal processing (DSP) for acoustic protection and enhanced call clarity. Its robust build, lightweight design, and 1.075 m cable make it suited for day-long professional use in boardrooms and call center deployments requiring consistent, high-quality voice transmission.
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 2309-825-109 |  2486-825-209 |  4993-823-109 |  2393-829-189 |  24089-889-899 | |
|---|---|---|---|---|---|
| Product Type | Headset | Audio Equipment | Audio Equipment | Audio Equipment | Audio Equipment |
| Audio Device Type | Headset | Headset | Headset | Headset | Headset |
| Microphone Type | Condenser | Condenser | Condenser | Condenser | MEMS |
| Speaker Type | N/A | N/A | N/A | N/A | Active |
| Form Factor | Head-band | Portable | Portable | Headset | Portable |
| Use Case | Office / Call Center / Unified Communications | Unified Communications / Conference Room / Contact Center / Office | Unified Communications / Conference Room / Meeting Spaces / Call Center | Unified Communications | Unified Communications / Conference Room / Office / Remote Work |
| Channel Configuration | Stereo | Mono | Mono | Mono | Mono |
| Connectivity | Quick Disconnect (QD) | 3.5mm / Quick Disconnect (QD) | USB | USB-C | USB-C |
| Input Types | N/A | N/A | USB | USB-C | USB-C |
| Output Types | Quick Disconnect (QD) | 3.5mm | USB / 3.5mm | USB-C | USB-C |
| Power Output (if applicable) | N/A | N/A | N/A | N/A | N/A |
| Power Source | N/A | N/A | USB-Powered | USB-Powered | USB-Powered |
| Frequency Response | 100 Hz – 10 kHz | 80 Hz – 16 kHz | 150 Hz – 7 kHz | Speaker: 100 Hz – 10 kHz; Microphone: 150 Hz – 6.8 kHz | 20 Hz – 20 kHz (Speaker), 100 Hz – 8 kHz (Microphone) |
| Signal Processing | DSP / Acoustic Shock Protection / Noise Cancellation | DSP / Noise Suppression | DSP / AEC / Noise Suppression | DSP / Noise Suppression | DSP / AEC / Noise Suppression |
| Audio Codecs Supported | N/A | N/A | N/A | N/A | N/A |
| 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 | No | No | No |
| Product Name | 2309-825-109-Biz 2300 QD Duo Siemens - Headset - Head-band - Office/Call center - Black - Binaural - 1.075 m | Jabra BIZ 2400 II Mono 3-1 NC WB Balance | Jabra Evolve 20 MS Mono | Jabra BIZ 2300 Mono USB-C UC | Jabra Evolve2 40 USB-C UC Mono |
| Height | 7.2 | 7.1 | 6.46 | 6.6 | 7.7 |
| Width | 6.1 | 5.5 | 7.36 | 5.6 | 6.1 |
| Depth | 2.0 | 2.3 | 2.32 | 1.6 | 2.2 |
| Weight | 0.12 | 0.13 | 0.22 | 0.115 | 0.42 |
QD duo headset with reliable clarity and strong build quality.
Comfortable dual-ear fit and dependable wideband audio.
Excellent microphone pickup in busy call centers.
Durable design for high-volume professional environments.
Consistent performance and reliable desk phone integration.
The Biz 2300 QD Duo Siemens headset offers binaural wearing, superior noise-canceling microphone, durable headband design, 1.075 m Kevlar-reinforced cable, and Quick-Disconnect (QD) compatibility with leading office phone systems.
The precision-tuned microphone filters out background noise and emphasizes the speaker’s voice, ensuring crystal-clear communication even in busy office or call-center settings.
The Quick-Disconnect (QD) plug works seamlessly with major brands such as Avaya, Cisco, Siemens, Panasonic and other RJ-9 phone systems when paired with the appropriate adapter.
Yes, the lightweight head-band design and soft leatherette ear cushions provide ergonomic comfort and balanced weight distribution for extended wear.