1. Bluetooth 5.0 Compared to other BT.4.2 earbuds, X11 wireless earbuds equipped with the latest BT.5.0 chip for 2x faster wireless transmission, 1.5x faster pairing time. 2. Easy One-Button Control One button delivers multiple functions by different operations, such as power on/off, answer/hang up, play/pause, redial, etc. 3.