Nanmi(TM) Small Wireless Blutooth 4.0 Invisible Earbud Headset Headphone Earphone Support Hands-Free Calling for Phone Pad (Coffee) Notice : The Bluetooth earphone is only for RIGHT ear, not a pair,Compatible with any smartphone with bluetooth.Pairing Instruction: Press and hold the button until the voice states"Ready to pair" or the LED light flashing Red and Blue. 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. 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 Compared with the conventional bluetooth headset, charging speed is increased by 50%, save your charging time.Pairing Instruction: Press the power button of the headset for about 5 SECONDS or LONGER until you see the Blue & Red Light blinks alternately or Hear a beat, then you could connect it with your cellphone