Features: Mini and Invisible: Super mini size headphone, invisible and 5g lightweight design is suitable for working, driving, running, climbing and other sports. BT Connection: Wireless BT 4.1+ERD Technology ensures transmitting strong signal in high quality and high speed and offering high-fidelity stereo music. Hands-free with Mic: With high-fidelity microphone, it supports hands-free calls, which can prevent danger during driving. Cool Fashionable Appearance: With cool and fashionable appearance, it is attractive and alternative. When charging, pairing, powering on and off, its two eyes flashes red or green light. Simple Operation: Simple operation, easily control playing / pausing music, answering / rejecting / ending an incoming-call and redialing the last number.