Nocobot(TM) Small Wireless Bluetooth 4.0 Invisible Earphone Headset Earbud Support Hands-free Calling For iPhone Samsung HTC LG Blackberry and Most Smartphones (Coffee) Simple and Stylish-The Newest Bluetooth headset with lightweight and compact portable design Built-in HD and sensitivity microphone. Ideal for in-car calling or working use. Support clear and natural sound when calling Up to 4 hours of continuous talk time, 3.5 hours of music time with a full charging 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 earphone is only for RIGHT ear, not a pair