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Jabra BIZ™ 2400 II QD Duo NC Headset (2409-820-204) (QD connection, not USB)

Wired contact-centre kit built to last: a reinforced cord, a boom arm that rotates 360° without risk of breaking and soft leatherette head and ear padding. The connector unclips in one move when you leave your desk.

  • Connects to a desk phone or a computer through a QD cord or a Jabra Link adapter
  • Two earpieces — you shut out the hubbub
  • Air Shock noise-cancelling microphone, filtering out breath sounds and banging noises
  • Boom arm that rotates 360° without risk of breaking (FreeSpin)
  • Control unit: volume, microphone mute
  • Reinforced cord, protected against chair castors and sharp objects
  • PeakStop hearing protection: any sound above 118 dB is filtered out
  • Speakers that reduce ambient noise
  • HD voice technology for clear voices
  • Very soft leatherette head and ear padding
  • Large ear cushions supplied as standard
  • Adjustable headband and boom arm
  • Compatible with more than 10 000 desk phones, softphones and contact-centre platforms (Cisco, Avaya, Genesys Cloud)
Ref.: 2409-820-204
Jabra BIZ™ 2400 II QD Duo NC Headset (2409-820-204) (QD connection, not USB) — image 1

Non-contractual photos

The visuals on this page are supplied by the manufacturer. They are frequently produced for a whole range — not for the exact model you are viewing: what you see in the photo is never a promise of what is included.

No exchange, return or cancellation will be accepted on the grounds that something seen in a photo (accessory, port, colour, keyboard layout, packaging…) is not found on the delivered product. Only the specifications written on the page are binding for the order.

What the image does not guarantee:

  • Staging : microphone stand, boom arm, pop filter, mounts and ambient speakers photographed are not included unless stated.
  • Quantity : the number of speakers or channels visible in the image does not necessarily match the set sold.
  • Cables and tips : the cables, adapters, ear tips and cases supplied are those listed in the specifications.
  • Specifications : Bluetooth, jack socket, USB, noise cancellation and battery life cannot be read from a photo.
  • Colour : one image often serves several colours, and the shade you see depends on studio lighting as much as on your screen settings; the colour sold is the one in the title and the specifications.
  • Props and accessories : the items shown around the product (cables, stands, decorative objects, content displayed on screen) are not included unless explicitly stated.
  • Packaging : boxes, labels and bundles change with the manufacturer's revisions: the packaging delivered may differ from the one in the photo.

What is binding: the product title, this page's technical specifications, the description and, when provided, the manufacturer's PDF datasheet available in the downloads.

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2 349,00 DHincl. VAT

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Product overview

Jabra Biz 2400 II QD Duo stereo headset: a wired professional headset that delivers outstanding sound at both ends of the call.
Connectivity: QD (Quick Disconnect) connector — it does not plug in by USB on its own; it connects to a desk phone or a computer through a Jabra Link QD cord or adapter, and unclips in one move.
Microphone: an Air Shock noise-cancelling mic that filters out background noise and unwanted breath sounds for a clear voice; the boom rotates through 360° and is virtually unbreakable thanks to the FreeSpin system.
Comfort & durability: extremely lightweight design, soft faux-leather ear cushions, reinforced cord that stands up to the demanding contact centre environment.
Also: speakers that reduce ambient noise, HD Voice technology, PeakStop acoustic protection, control unit for volume and mute.

See all the specifications ↓
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Technical specifications

Technical specifications
WirelessNo
Wireless technologyNone (wired headset)
Microphone typeAir Shock noise-cancelling microphone
Talk timeNone (wired headset)
Standby timeNone (wired headset)
ConnectivityWired, QD connector
MicrophoneYes
Additional featuresNoise cancelling effect
TypeHeadset
ConnectorQD (Quick Disconnect)
ListeningStereo (both ears)
Noise cancellationNo noise reduction
Technical specifications (continued)
Headphone useCalls & remote working
Headset connectionQD (Quick Disconnect) — Jabra Link connection cable to be ordered separately
Adapter or receiver includedNone (QD connection cord ordered separately)
Headset chargingNone (wired headset)
Wireless rangeNone (wired headset)
Simultaneously connected devicesNone (wired headset)
Listening timeNone (wired headset)
Charging timeNone (wired headset)
Microphone boomJabra FreeSpin boom, rotates 360°
Hearing protectionPeakStop
Warranty1 month

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Video — Jabra BIZ™ 2400 II QD Duo NC Headset (2409-820-204) (QD connection, not USB)

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Under Law 09-08, you have the right to access, rectify and object to the processing of your personal data. This processing has been authorised by the CNDP under no. D-CE-389/2015. Learn more

Frequently asked questions about this product

Does the Jabra Biz 2400 II QD plug straight into a USB port?
No. It ends in a QD (Quick Disconnect) connector and connects to a desk phone or a computer with a QD cord or a Jabra Link adapter. Make sure you get this connecting part along with the headset.
Are the large ear cushions included with this Duo version?
Yes. Jabra supplies the large ear cushions as standard on the Duo versions, whereas they remain an accessory on the Mono versions. They are designed for the headband version, which is the one this model uses.
What is the “air shock” microphone on the Biz 2400 II?
It is the noise-cancelling microphone that filters out sharp breathing sounds and pops — plosive consonants — often heard in close-up conversation. In return, HD voice technology makes the incoming voice clearer.
Is the mic boom likely to break from being turned so often?
It turns through 360° without risk of breaking, thanks to the FreeSpin system. The headband and the boom are adjustable, so several agents can share a desk without forcing the hinge.
Does the cord hold up in a call centre environment?
It is reinforced and explicitly protected against office chair castors, sharp objects and daily use. Jabra presents this as an availability advantage: fewer headsets replaced, fewer interruptions for the team.
What happens if a loud, sudden sound reaches your ear?
PeakStop technology removes it before it reaches your ear: any sound above 118 dB is filtered out. This is the protection that matters at a desk where you cannot choose what comes down the line.
Can you listen to music with this call centre headset?
Yes. Jabra states Hi-Fi sound for music as well as voice, and its speakers reduce ambient noise to help you concentrate on the call. The ear cushioning is in very soft faux leather.
Which phones and platforms does this headset work with?
Jabra states more than 10,000 traditional desk phones, as well as softphones and contact centre platforms: Cisco, Avaya, Genesys Cloud and Microsoft Teams. The QD cord you choose determines how it connects.
Is this Jabra Biz 2400 II QD Duo new and under warranty?
Yes, new in its original Jabra packaging. Your invoice serves as the warranty document and covers 1 month for this model: that is the period actually stated on the product page, shorter than for the rest of the category.

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