Features: * BT 4.1 technology ensures strong signal and fast transmission, and offers high-fidelity stereo music, suitable for iOS / Android / Windows smartphones and other BT-enabled devices. * The BT headset with 4g lightweight, super mini size provide you long time wearing comfort, and guarantee 100% stable. Easy to use and custody. * High-sensitivity microphone grasps the detail of voice, ideal for in-car calling or working use. * Multi-point Technology enables you to switch between your business and personal phones. * Simple operation, easily control playing / pausing, answering / ending / rejecting an incoming-call and redialing the last number.