Mini Invisible Daydayup Ultra Small Bluetooth 4.0 Earbud Headset with microphone, Support Hands-free Calling For Smartphones, Perfect for Listening to Music at work (White/Gold) The Newest bluetooth headset with lightweight and compact portable design.We are committed to creating the most Mini bluetooth headsets. Simple and Stylish. Built-in HD and sensitivity microphone. Ideal for in-car calling or working use. Support A2DP , makes you can enjoy clear and natural sound when calling. Built-in 50 Mah polymer battery. Up to 4 hours of continuous talk time, 3.5 hours of music time. Pairing Instruction: Press and hold the button until the voice states"Ready to pair" or the LED light flashing Red and Blue. Voice prompts: to cable / is powered / powered off / connected, etc.