✓?global warranty &multi-purpose?24 months warranty by eaglend. Great ideal for online courses, Skype chat, call center, Webinars Presentations, Office, Business, Rosetta Stone, Dragon Speaking, Conference Calls and more. ✓?USB/3.5mm Connection? The headphone is designed for multiple use,with mic mute &indicators /speaker mute.Compatible with PC/Tablet/Mac/iOS/laptop /Android phone and other devices.". ✓?Enhanced sound performance & 40mm audio driver?:Corded phone headset with built-in audio sound card, Eaglend sound lab tested thousands of times for your daily conversation/music/movie/gaming, bringing you extra clear and bass for pleasant experience. ✓?All-Day Comfort for All Head Shape? Eaglend always designed for all-day comfort using, there will be no restraint pressure, with the adjustable headbend fit adult and kids easily.The soft protein memory foam earpads is made of high-level breathable materials,ROHS certified materials prevent your ears from heat and sweat. ✓?Outstanding Noise cancelling Microphone? The headphones with unidirectional boom 270°microphone that only picks up your voice and block out unwanted background noises. Also, you can wear it on the left or right ear as you like.