Actpe Mini Wireless Bluetooth 4.1 Invisible Headphone, Stereo Headset with Microphone & Hands-Free Calls In-ear Earphone, Noise Cancelling Earbud for iPad, iPhone, IOS & Android Smartphone - Black The smallest Bluetooth earbud in the world, designed with Ergonomic appearance and invisible size for discreet listening to music without missing important things during work. 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 4 hours of continuous talk time, Up to 3.5 hours of music time. Can connected with two smartphone at the same time, the wireless range up to 10 meters. Pairing Instruction: Holding down 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. Attentions: Only include one Right earbud, not a pair; Please do not charge the headset for more than 2 hours, and the LED indicator will turn on Red when you charge it, then it will turn off automatically when the headset is fully charged which needs 1 hour or 2 hours.