How does the headset connects to a desk phone? Is it 2.5mm jack or anything else?

Hello Lipread- thanks for your interest in the Jabra Biz 2400 II Quick Disconnect (QD) headset! The Biz 2400 II connects to a desk phone using a QD to desk phone cable. Please do not hesitate to contact us if you have any additional questions: https://www.jabra.com/supportpages/jabra-biz-2400ii/2409-820-205/contact-support

is this a USB Headset?

Hi Lisa- The Jabra Biz 2400 can be connected via USB-A Cable. Please let us know if you have any additional questions: https://www.jabra.com/supportpages/jabra-biz-2400ii/2496-829-209/contact-support. Thank you!

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JabraBiz 2400 II Quick Disconnect On-Ear Stereo Headset - Noise-cancelling and Corded Lightweight Headphone with HD Voice and Soft Head Cushioning for Deskphones

JabraBiz 2400 II Quick Disconnect On-Ear Stereo Headset - Noise-cancelling and Corded Lightweight Headphone with HD Voice and Soft Head Cushioning for Deskphones

Product ID: 63100005

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Details

Brand
Jabra
Colour
Black
Ear placement
Over Ear
Form factor
On Ear
Impedance
32 Ohm
Noise control
Active Noise

🎧HD stereo sound clarity

🔇Noise-cancelling air shock mic

🛡️PeakStop tech for hearing protection

Description

🎧 Elevate your workspace sound — because your calls deserve clarity and comfort.

HEARING SAFETY FIRST - PeakStop technology instantly filters harmful loud noises to protect your ears all day.
SEAMLESS CALL CONTROL - Quick Disconnect feature lets you pause and resume calls without missing a beat or removing your headset.
CRYSTAL CLEAR HD AUDIO - Experience premium sound quality that keeps you focused and professional.
ERGONOMIC ALL DAY COMFORT - Lightweight Kevlar frame with plush leatherette cushions and a 360° FreeSpin boom-arm for flexible wear.
ADVANCED NOISE CANCELLATION - Block out distractions with the air shock microphone designed for busy workspaces.

The Jabra Biz 2400 II is a professional-grade, corded on-ear stereo headset designed for deskphone use. It features HD voice quality, noise-cancelling air shock microphone, and PeakStop technology to protect hearing. Built with a lightweight Kevlar frame, padded leatherette cushions, and a 360° rotatable boom-arm, it ensures all-day comfort and durability. The Quick Disconnect cable allows flexible call management without interruptions, making it ideal for dynamic office environments.

Specifications

Included components	1 x Headset
Age range (description)	Adult
Material	Kevlar
Specific uses for product	Calling
Recommended uses for product	Calling, Recording
Compatible devices	Deskphone
Theme	Professional Communication
Control type	Media Control
Cable feature	Retractable
Item weight	0.38 Pounds
Water resistance level	Water Resistant
Frequency range	120 - 4500 hertz
Package type	Standard Packaging
Unit count	1.0 count
Style	Noise Cancelling
Product Dimensions	18.8 x 14.73 x 6.86 cm; 172.37 g
Item model number	2409-820-205
Connector	Wired
Material Type	Kevlar
Size	Quick Disconnect
Colour Screen	No
Compatible Phone Models	Unspecified
Computer Memory Type	DIMM
Operating System	Android
Power Source	Corded Electric
Item Weight	172 g