Simple and stylish: the newest Bluetooth headset with lightweight and compact portable design, we are committed;Built-in HD and sensitivity microphone: idea for in car calling or working use, 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;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