Advanced Lossless Audio Technology - Are you still troubled by choosing a high performance bluetooth headset with mic for your business or driving? With a built-in advanced microphone and dynamic speaker, this Bluetooth headset wireless minimizes the sound distortion, meanwhile, it can also improve the quality of phone conversations even when you're on-the-go or working in a noisy office. ? One-button Design for Hands-free Control: Only takes one pressing to connect the device instantly, our bluetooth phone earpiece is super fast to operate with ease. With the addition of a shortcut key, you can activate Siri/Google/Cortana voice assistant or switch to the silent mode at your will. The Multifunction button on this hands-free earpiece helps you manage the music and phone calls without wasting any time. ? An Ergonomic Design Enhances Comfort Level: Business design, generous and decent, Soft rubber material, greatly improve the comfort of wearing. Connect Two Devices Simultaneously -- Pairing 2 Bluetooth devices with the single e wireless earbud at the same time by ? connecting A device then disconnected or turn off the BT; ?connect B device and when is connected successfully,restart connect A device.