AUKEY Loops Wired Headphones, In-Ear Earbuds Comfort Fit with Dual Moving-Coil for Cell Phone, Laptop Computer and Other Devices Advanced noise isolation dynamic moving coil technology designed to deliver balanced, precise audio response Interchangeable (S/M/L) silicone buds and flexible ear hook included to ensure comfortable, secure fit At only 45 oz, EP-C3s are ultra-lightweight for maximum mobility Device Compatibility: 3.5mm audio jack-equipped devices like smartphones, tablets, mobile devices, MP3 players, computers, and more Package Contents: AUKEY EP-C3 Stereo Earbuds, Ear Tips (S, M, L), User Manual, Warranty Card