We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Black dual-ear wired headset with adjustable headband and flexible boom microphone, Quick Disconnect plug visible

Jabra Consumer Products

Jabra Biz 2400 II QD Duo UNC Wired Headset

SKU CH-ZBAX-VCH5Q

Dual-ear wired headset with ultra noise-cancelling microphone, Kevlar-reinforced cord and Quick Disconnect plug for desk phones and UC systems

  • ConnectionQuick Disconnect
  • Wearing styleCircumaural
  • Cord length3.0 ft - 5.0 ft
  • Headphone frequency range80 Hz – 16,000 Hz
  • Driver size30 mm
  • Noise cancellationActive
  • Dual-ear design keeps focus in noisy spaces
  • Ultra noise-cancelling mic filters background sound for clear calls
  • Kevlar-reinforced cord with 360° Free Spin boom arm resists daily wear
  • Wideband audio delivers natural voice quality
  • Lightweight 70 g build reduces fatigue during long shifts

Professional dual-ear headset for call centres

The Jabra Biz 2400 II QD Duo UNC is a wired headset built for high-volume contact centres and office professionals who need clear, reliable communication all day. Its circumaural, dual-ear design covers both ears to help users focus in noisy open-plan environments. The ultra noise-cancelling boom microphone filters background sound so only the speaker's voice is transmitted.

Quick-disconnect cord fits existing desk phones

A Quick Disconnect plug lets the headset detach instantly from the coiled cord, which stretches from 3.0 ft to 5.0 ft, so users can step away without removing the headset. The Kevlar-reinforced cable resists daily wear, while the 360° Free Spin boom arm positions the mic on either side without cable strain. No internal battery is required; power and audio travel through the QD connection to the host device.

Suited for all-day desk phone or softphone users

Agents who spend hours on calls will appreciate the lightweight 70 g frame and wideband audio clarity. Buyers needing wireless freedom, Bluetooth pairing or a single-ear wearing style should consider other models, as this unit is wired-only and fixed in a dual-ear configuration.

How it compares

Measured against everything we stock in Wired & Wireless Headsets, at today’s prices. Recalculated every night.

Price $162.99
Pricier than about 82% of the 1,586 comparable items (median $60.99).

Specifications

Product
Brand nameJabra
Product lineBiz 2400 II QD
Model nameBiz 2400 II QD
Part number240982-265-119
Product colorBlack
Audio & video
Wearing styleCircumaural
Headphone frequency range80 Hz – 16,000 Hz
Driver size30 mm
Noise cancellationActive
Mic impedance150 Ω ±15% @ 1 kHz / 1.0 V
Mic frequency response100 Hz – 10,000 Hz
Mic signal-to-noise ratio> 70 dB
Mic sensitivity-51 dBV/Pa ±3 dB
Connectivity
Wireless technologyWired
Ports & slots
ConnectionQuick Disconnect
Power
Power typeQuick Disconnect (QD) cable to desk phone / communication system — essentially a wired connection with no internal battery
Size & build
Cord length3.0 ft - 5.0 ft
Product weight1.56 lb (0.71 kg)
In the box
In the boxJabra headset

Questions about this item

How long is the Kevlar-reinforced cord when fully extended?

The cord stretches from 3.0 ft to 5.0 ft, giving enough reach for desk movement without excess slack.

Does the 30 mm driver and 150 Ω impedance run warm during all-day calls?

The headset is passive and draws no internal power, so it stays at room temperature even after continuous use.

Which Quick Disconnect cable or adapter do I need to plug this into my desk phone?

A compatible QD-to-phone cord or USB QD adapter is required; the headset only provides the QD plug itself.

More in Wired & Wireless Headsets

Similar items