Bluetooth Headphones By Zivigo Lightweight Wireless Bluetooth Earbuds, bluetooth sport headphones, Bluetooth Earbuds For Running, Bluetooth 4.0 with Aptx, Premium Sweat Proof Earbuds with Built in Microphone, (Black+Green) 60% SMALLER AND MORE LIGHTWEIGHT THEN THE COMPETITION MODELS ADVANCED BLUETOOTH 4.0 TECHNOLOGY WITH APTX CODEC deliver Wireless Music and Calls coupled with superior audio performance rivaling the best in wired headphones ERGONOMICALLY DESIGNED - Compact and lightweight wireless earbuds with in-ear design for secure Fit and premium sound. Long lasting up to 6 hour Lithium-Ion battery CONVIENIENT ON BOARD CONTROLES - allow you to change volume, play and pause your music, and answer the phone without skipping a beat CVC 6.0 SMART NOISE REDUCTION - improve call quality, You can begin enjoying CD quality stereo sound instantly, -LANGUAGE SWITCH - ZV-600 support language switch  When ZV-600 on working mode, press both volume + and volume - together, until you hear voice function switch