Features:[Wireless 5.0 and compatibility]BT5.0 connection can achieve faster transmission speed, longer transmission distance, lower power consumption, more stable data transmission, strong compatibility, suitable for almost all BT-enabled devices.[Long battery life]Built-in rechargeable battery for long battery life. It only takes about 1.5 hours to charge, and it can be used for about 5 hours continuously.[Open wear]Open wear, no ears, no pain for a long time. Protect ears, conduct air, and surround directional sound field.[Foldable]Titanium alloy memory steel wire frame, not afraid of folding, bending storage. It is small in size and takes up almost no space. It is convenient to put it in bags and so on.[Built-in microphone]Wireless communication can be realized. The built-in microphone makes it easy to receive calls while driving or reading a book.