The newest Mini Wireless Stereo Bluetooth Headphone For Smart Phone Laptop, Mini Earbud Headsets for iPhone 4 4S 5 5S Samsung Galaxy S4 S5 i9600 Note 2 3 Android Laptop iPad Tablet (White) Build-in Micphone,easy free Talk,Make your hands free Effective range:up to 10 metres Lasting Talk Time:Up to 3 hours Standby time:up 100 hours Super Mini Size,Diameter is about 22mm