Airmate&reg; Ultra Mini Wireless Invisible Bluetooth 4.0 In ear Music Earphone Earbud Headset Headphone with Microphone for iPhone,Samsung, LG, iPad, HTC and most Smartphone Simple and Stylish: The Newest bluetooth headset with lightweight and compact portable design, We are committed to creating the most Mini bluetooth headsets Built-in HD and sensitivity microphone: Idea for in car calling or working use. Perfect for Stealth Listening or watching at work. ect for Stealth Listening or watching at work Built-in 50 Mah polymer battery. Up to 4 hours of continuous talk time, 3.5 hours of music time. Only need to charging 2 hours. Do not over 2 hours Pairing Instruction: Press and hold the button until the voice states"Ready to pair" or the LED light flashing Red and Blue Notice : The bluetooth is only for one ear . Not a pair.Due to the difference of people's ear, this earphone maybe not fits everyone