Jabra Biz 2400 II QD Mono 3-in-1 Headset
The Jabra Biz 2400 II QD Mono 3-in-1 headset delivers outstanding sound on both ends of the call. Weighing 40% lighter than competing headsets with soft leatherette ear cushion, it offers superior audio quality, reliability, and comfort. This headset is built to last with a reinforced cord and 360-degree rotating boom arm.

Better Conversations For A Better Experience
The most important function of a contact center headset is eliminating background noise from the busy environment and letting the customer hear your voice clearly. The Biz 2400 II QD Mono 3-in-1 headset has a superior noise-cancelling microphone that helps eliminate background noise to give a better customer experience.

Better Sound for Crystal Clear Calls
If you’re in a busy environment, you need great sound to hear the voice of your customer. Additionally, when you’re concentrating on work, you want that HIFI sound for music. The Jabra Biz 2400 II is great at both.
- HD voice technology makes sure you clearly understand the other party
- The speakers reduce ambient noise, so you can focus on the call
- Specially designed “air shock” noise-cancelling mic filters out sharp breathing sounds and popping noises often heard in conversations.
Better Design to Last For Years
Jabra Biz 2400 II QD Mono is built to last in a high-performing contact center, meaning fewer headset replacements and less downtime for you and your team and lower total cost of ownership.
- Reinforced cord is built to withstand the contact center environment and is protected against office chair wheels, sharp objects and daily use
- Boom arm can be rotated 360 degrees with zero risk of breaking. We call this FreeSpin™.
Better Comfort for All-Day Wear
The Jabra Biz 2400 II has an extremely lightweight and unobtrusive design. This means lowered agent fatigue and more productive calls.
- 40% lighter than competing high-end headsets
- Adjustable headband and microphone boom arm let you find the perfect fit
- Control unit lets you change volume, mute your calls, and more
- PeakStop™ technology removes sudden loud sounds or tones before they reach your ears: Any sound above 118db is filtered out.
- Super-soft leatherette head-and-ear cushioning

Jabra Biz 2400 II QD (Quick Disconnect) Series
Corded Headsets:
The Biz Series offers a range of professional corded headsets with great sound, designed for call center agents, customer service advisors and others who listen and talk to customers for a living.
Crystal clear conversations:
Noisy workplaces can make calls a struggle for agents and customers. Biz Series headsets take noise out of the equation, helping you focus on the conversation. HD Voice technology and noise-cancelling microphones ensure crystal clear sound quality at both ends of the call for a more professional customer experience.
All day comfort:
Biz Series headsets are made for all day wear, with ergonomically designed frames, lightweight design and super soft foam or leatherette ear cushions. Headbands and microphone booms can be adjusted for comfort.
Tough design:
High-performing contact centers and other call-intensive environments need headsets that can survive countless hours of use. The Jabra Biz 2400 II QD Mono 3-in-1 headset is highly durable, with an adjustable boom-arm that can be rotated without the risk of breaking.
Easy to deploy and manage:
USB Biz Series headsets are optimized for use with all leading desk phone systems and Unified Communications platforms. Jabra Xpress enables you to easily configure all of your company’s audio devices from one central point.
Extensive range:
Biz Series headsets are available in QD versions for your desk phone or USB versions for your computer, and in Mono and Duo versions.
Jabra Biz 2400 II QD Technical Specifications:
General
- Weight
- w/ cord: 61g | 2.15 oz
- w/o cord: 45g | 1.57 oz
- Headset dimensions: 141 x 183 x 67mm
- Warranty: 3 yr
- Model: Jabra HSC021
- SKU: 2406-820-205
- UPC: 706487015574
- Also available:
- Jabra BIZ 2400 II Mono, Ultra Noise Canceling, 3-in-1 wearing styles (Call to order)
- SKU: 2406-720-209
- UPC: 706487015598
Jabra Biz 2400 II QD Headset Replaced/Updated
- Jabra Biz 2400 II USB Mono 3-in-1 Headset
- UC Version – SKU: 2496-829-309 / UPC: 706487015697
- MS Teams Version – SKU: 2496-823-309 / UPC: 706487015710
Audio
- User sound protection: PeakStop™ 118dBA SPL (RMS)
- Speaker size:
- NB: Ø 30x 6.8mm
- WB: Ø 30x 6.4mm
- Speaker Max input power: 20mW
- Speaker sensitivity:
- NB: 10 dB Pa/V ±3dB
- WB: 8 dB Pa/V ±3dB
- Speaker impedance:
- NB: 300Ω ±15%/1kHz/ 1.0V
- WB: 300Ω ±15%/1kHz/ 1.0V
- Speaker frequency range:
- NB: 100Hz to 4,500Hz
- WB: 150Hz to 6,800Hz
- Speaker bandwidth
- Music mode: NB: 100Hz to 4,500Hz | WB: 150Hz to 6,800Hz
- Speak mode: NB: 100Hz to 4,500Hz | WB: 150Hz to 6,800Hz
- Microphone type: Noise canceling, Uni-directional
- Microphone sensitivity:
- STD NC: -30 dB V/Pa±3dB, Pin=1Pa, 0dB=1V/Pa
- STD UNC: -28 dB V/Pa±3dB, Pin=1Pa, 0dB=1V/Pa
- Microphone frequency range: 101Hz – 8kHz
- Microphone bandwidth: 100Hz – 8kHz
- Microphone power consumption: Current consumption 70-150µA@RL=3.9kΩ, Vs=3.0V
- Power consumption: N/A
- Certifications: CE, FCC, UL
Fit & Comfort
- Headset form factor: Headband, earhook, neckband
- Boom arm adjustable: 360°
- Boom arm flexible: Yes
- Headband padding: Yes
- Ear cushions: Leatherette
Connectivity
- Device: Desk phone
- Connection (mini jack, USB, etc): Quick Disconnect (QD)
- Cord length: 100cm
- Headset bandwidth: Hybrid wideband speaker for QD (up to 4,500Hz)
Box Contents
- QD headset
- Ear hook
- Neckband
- Warranty card
- Warning card
- Quick start guide
- Carrying pouch
Features
- Hi-Fi audio quality
- 3 wearing styles incl – over head, over ear, behind neck
- Ultra Noise cancelling microphone
- Gold contacts for crystal-clear voice transmission
- Break-proof FreeSpin boom with 360–degree-plus rotation
- Surgical steel details for maximum strength
- Ultra-strong Kevlar®-reinforced cord
- 3-Year warranty
Manufacturers Description
The Jabra BIZ 2400 II headsets for traditional desk phones are part of a comprehensive family of headsets that raises the bar on corded headset quality and performance.
The Jabra BIZ 2400 Series features a cascade of improvements that pushes the envelope for the levels of audio quality, comfort and durability necessary for dealing with the special requirements in contact center and office environments.
PeakStop™ instantly removes any harmful loud sounds before they even reach your ears. This keeps the sound level in the safe range and protects your hearing..
Find the perfect fit with a range of light, ergonomically designed frames, soft ear cushions, adjustable headbands and microphone boom. Your headset will be comfortable all day long..
HD Voice lets you have lifelike, vibrant conversations. You will not have to struggle to hear what the other person is saying.
You can rotate the boom-arm 360 degrees without the risk of breaking it. Find the microphone placement that works for you.
Kevlar reinforced cord
Cords are built to last and reinforced with Kevlar®. They are extremely durable and will take most daily punishments.
You can purchase a variety of different cords that let you connect to your smartphone or desk phone.
Noise-cancelling microphone reduces unwanted background noise and is ideal in noisy open-office environments. Ultra noise-cancelling variant is also available.
Anti Shock Microphone
Having the mic close to your mouth can cause unwanted breathing noises. To reduce this, we have designed the mic with many small holes and placed a layer of foam on the inside. This prevents most air shocks and improves call quality.
Jabra BIZ 2400 II headsets are also available in wideband versions optimized for IP hardphones and softphones, and a USB stereo model for the ultimate IP/multimedia experience.













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