Z:ero Digital Earphone - Red Digital USB Audio interface using micro-USB connector to your Android Phones Integrated on board HiFi AudioDAC and headphone amplifier, loud and clear sound Aluminum earphone enclosure, stylist wiring, carrying pouch and PC USB adapter 3 buttons control for amplifier volume-up/down, play/pause/prev/next operation Compatible with Samsung Galaxy S3/S4/S5/S6/S6-Edge, Note 2/3/4/Edge; LG G2-Pro/G3/G4; Sony Xperia Z1/Z2/Z3; HTC One M7/M8, Droid-DNA; Motorola Moto X, Droid-Turbo; OnePlus One; Google Nexus 5/6; Asus ZenFone 2