<p><b>Simplify the Surface and Operation ：</b></p> <p></p> <p>Simplified the appearance and design of the buttons. There are only 2 buttons on the surface, one for multifunction and one for changing the TX / RX mode. A key to switch between the transmitter and receiver function.</p> <p></p> <p><b><br></b></p> <p><b>Small & Portable ：</b></p> <p></p> <p>Small and practical Bluetooth transmitter and receiver, suitable for carrying without taking up too much space.</p>