<p><b>TX mode:</b></p> <p>Use the micro USB cable to charge before use.</p> <p>Connect the C28 to your audio device using the AUX cable.</p> <p>Change the switch button to TX position.</p> <p>Turn on the device ( press and hold the multi-function button ) and the red light will flash quickly to indicate that it is ready for pairing.</p> <p>Turn on the device to be connected, the C28 will automatically connect and the wireless indicator will light up red when the connection is successful</p> <p><b>RX mode:</b></p> <p>Charge with Micro USB cable before use.</p> <p>Connect the C28 to your audio device using the AUX cable.</p> <p>Change the switch button to RX position.</p> <p>Turn on the device (press and hold the multi-function button) and the blue light will flash quickly to indicate that it is ready for pairing.</p> <p>Find the C28 in the phone's wireless search and select pairing.</p> It can last for 8 hours when fully charged and supports charging while playing music, answering calls, etc.<p></p> <p>Bluetooth coverage up to 33 feet, make sure there are no obstacles in between, such as walls!</p> <p>The mini size can meet the needs of most people, easy to carry and plug and play anytime, anywhere!</p>