Details:You will receive a lot of the headphones pictured, (10-1000 in lot size) these are considered disposable and are great for schools, churches, or complementary or promotional headphones, and they should last several uses. We include these as complimentary headphones with a lot of MP3 players we sell. Need more than the amount listed? We always have THOUSANDS in stock! Contact us for bulk inquiries.Compatibility:These are 3.5MM and will work with almost all devices including iPhone 4, 4S, 5, 5S, 5C, 6, 6S, 6 Plus, iPod Touch, iPod Nano, iPod Classic, iPad 1,2,3,4, iPad Mini, iPad Air, iPad Pro, Samsung Galaxy Devices, PSP, Nintendo DS, 3DS, Laptop, PC, Mac, etc.Length: 1 meter