Wireless Bluetooth 4.0 Invisible in Ear Mini Headphones Headset Earphone Earpiece Earbud, Toullfly Small Sport Wireless Bluetooth Headphones with Mic For iPhone, iPad, Samsung and Most Cell phones Simple and Stylish-The Newest Bluetooth headset with lightweight and compact portable design Built in HD and Sensitivity microphone. Idea for in car calling or working Office use. Perfect for Stealth Listening or watching at work or in the Office. Built-in 50mAh polymer battery. Up to 2.5 hours of continuous talk time, 2.5 hours of music time (base on music volume) Pairing Instruction: Press and hold the button until the voice states"Ready to pair" or the LED light flashing Red and Blue Attentions: Only include one earbud; not a pair. Please do not charge the headset for more than 2 hours