QZTELECTRONIC S530 Universal Mini Wireless In-Ear Earphone with Bluetooth 4.0 Stereo for iPhone Samsung (Black) 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 DSP audio processing system , HD and sensitivity microphone. Ideal for in-car calling or working use. Support A2DP , makes you can enjoy clear and natural sound when calling. Excellent in eliminating Noise and echo,Perfect 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. Press and hold the button until the voice states"Ready to pair" or the LED light flashing Red and Blue. Support multipoint connections, Compatible with most Bluetooth-enabled devices, Can connect two mobile phones at the same time and ready to answer the incoming call of one phone any time 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. If the one you get is not perfect for you, please let us know. We will find a best way to help you.