The Jabra BIZ 2400 NC 3-in-1 takes corded headsets to a new level of quality, with Neodymium speakers and gold contacts for optimum voice transmission, Kevlar and surgical steel construction for maximum durability, and flexible 3-in-1 wearing styles. The Jabra BIZ 2400 NC 3-in-1 includes the GN1200 Smart Cord. 3-year warranty — protects your headset investment by adding a full year to GN Netcom’s standard warranty. Super soft ear cushions — enhance comfort and make sure the earpiece fully encloses the ear for less distraction from surrounding noise. Specially designed T-bar — on headband to prevent it from getting tangled in your hair. PeakStop technology — protects users against acoustic shock which can result in hearing damage. Clothing clip with ID tag — keeps cord in place and prevents tangling. SPECIFICATIONS Connectivity Connectivity: QD Quick Disconnect (QD) Smart Cord Included - GN1200 Usage: Works with mobile phones (requires optional 2.5mm or 3.5mm adapter) Works with traditional desk phones (with included GN1200 cord) or (GN8210 adapter for phones without headset jacks) Works with WIFI phones (requires optional 2.5mm or 3.5mm adapter) Designed to optimize the experience of using a Unified Communications client, such as Skype or Microsoft Lync (requires optional Jabra Link 220 or 280 adapter) Works with DECT phones Connects to a PC and can be used to stream music/sound and for voice calls (requires optional Jabra Link 220 or 280 adapter) Control Center: No Control center is not supported by this device Jabra PC Suite: No This device does not have Jabra PC Suite Speakers Frequency Response: Narrowband Speakers with a narrowband frequency response are capable of producing sound in a range well suited for traditional analog phone lines Digital Signal Processing: No This device does not utilize DSP (Digital Signal Processing) Listening Mode: One ear Sound in one ear Microphone Microphone Type: Noise cancel Enhances call clarity by eliminating background noise from the office. Microphone Sensitivity: Standard (E-STD) Standard (STD) variation microphone sensitivity is comparable to a normal telephone receiver and is used in most telephone devices. Boom Arm Type: Flex Noise-cancelling microphone with excellent noise reduction - great for open, loud office environments. The boom arm can be adjusted to the user. Mute function: No There is no option to "mute/unmute" a conversation directly from the device Design Wearing Style: Headband, earhook, behind neck-band A headband is a fully adjustable, over-the-head wearing style Weight: 79 grams How much the headset weighs (in grams) Ear Cushion Type: Leatherette S Small (S) leatherette ear cushions