2.5mm Connector Compatibility: MKJ wired 2.5mm phone headset is fully compatible with office phones with 2.5mm headset jack, such as Cisco Linksys SPA 501G, 504G, 508G, 509G, 525G, SPA921, SPA941, SPA942, SPA962 etc, Panasonic KX-NT136 KX-NT343 KX-NT346 KX-NT366 KX-DT321 KX-DT333 KX-DT343 KX-DT346 KX-DT521 KX-DT543 KX-TG6531 KX-TG6532 KX-TG6533 Grandstream, Gigaset, Zulty etc. Please DO NOT buy this 2.5MM headset for cell phones or laptop computer. High Productivity: With 2.5mm telephone headset for office phones, users can do multitasks during the calls, such as typing, searching information on computer ... Call center headsets free your hands from cradling the handset with shoulder and neck. All-day Comfort: Sturdy yet lightweight 2.5MM office phone provides all-day comfort. This phone headset has a slim, stylish, lightweight design and comes with soft ear cushions for added comfort. The monaural headset can be worn on either ear, adjustable headband and microphone boom arm let you find the perfect fit and don't cause pain or fatigue after long hours of wearing. And its quick disconnect feature provides walkaway convenience, enabling users quickly leave for a short time. GREAT DURABILITY: MKJ wired headphone with 2.5mm jack is built with high-end materials to ensure maximum durability and design quality to withstand the constant demands of all-day use in busy environments. Stainless steel headband, superior quality speaker and noise cancelling microphone, and reliable plastic parts make this headset durable enough even for 24/7 busy environment. HD Sound Quality: This corded 2.5mm phone headset for Panasonic phone is suitable for office workers, SOHO, work from home or call center agents. Wideband audio technology with speaker frequency range 50HZ-10KHZ enable telephone headset delivering more richer and natural sound, plus ultra noise cancelling microphone to filter out background noise for clear 2-way communication.