<ul><li><p>This extremely portable, lightweight wireless audio transmitter &amp; receiver is an ideal wireless audio solution for a wide range of situations and uses</p></li><li><p>Transmitter mode:wirelessly streams audio from your non-Bluetooth TV, home stereo system, or CD player to your Bluetooth headphones or speakers</p></li><li><p>Receiver mode: wirelessly streams audio from your Bluetooth-enabled phone, tablet, or computer to your wired stereo, speakers, or headphones</p></li><li><p>Switch between transmitter and receiver modes with the simple flick of a switch, effortlessly connect using advanced Bluetooth technology and 3.5mm audio cable (included)</p></li><li><p>With the included 3.5mm cable and 3.5mm to 2RCA cable, this receiver transmitter adapter can widely be used on your computer, laptop, home stereo system, headphone, smartphone, MP3 player, CD player, etc.</p></li><li><p>Power on: Press and hold the power on/off button until the LED lights up</p></li><li><p>Shutdown: Press and hold the power on/off button until the LED is off</p></li><li><p>Charging: Use the DC-5V charger and micro usb charging cable, the red light is on during charging, when the battery is fully charged, the blue light is on</p></li></ul><p><strong>Switch Mode:</strong></p><ul><li><p>RX: Receive mode, indicator: blue LED</p></li><li><p>TX: Transmit mode, indicator light: red LED</p></li></ul><p><strong>RX Mode:</strong></p><ul><li><p>Pairing name: KN321, find KN321 in the Bluetooth settings of the phone to pair. The blue light flashes twice a second during the pairing process, and the blue light flashes once every three seconds after the pairing is successful.</p></li></ul><p><strong>Specifications:</strong></p><ul><li><p>Model: KN321</p></li><li><p>Technologies: BT5.0, A2DP, AVRCP (receiver mode only)</p></li><li><p>Operation Range: 10m (without any blocking objects)</p></li><li><p>Pairing Name: KN321</p></li><li><p>Charging Time: 2 hours</p></li><li><p>Battery Type: Li-Polymer (200mAh)</p></li><li><p>Dimensions: 44 x 44 x 12mm</p></li><li><p>Weight: 18g</p></li></ul>