Welcome to our store!</br> 1、USB mode does not need to use 3.5mm cable, directly plug into the car or speaker USB port, and can be used directly after pairing with phone Bluetooth. 2、In AUX mode, connect one end of the 3.5mm cable to the adapter, and the other end to the the car or speaker, and use directly after pairing with phone Bluetooth. 3、Built‑in microphone, you can make hands‑free calls through the microphone on the adapter, which is very convenient to use in the car. 4、Connect the speaker with a transmission range of up to 10m/32.8ft, enjoy the original sound. 5、Small, lightweight and portable, convenient for carry and storage, plug and play, easy to operate. <p class="wang-edit-text">Item Type:&nbsp;Bluetooth&nbsp;USB Transmitter Material: ABS Color: As Picture Shown Size: Approx.&nbsp;32x17x8.5mm/1.3x0.7x0.3in Weight: Approx. 21.0g/0.7oz Bluetooth Version: BT5.1, A2DP, AVRCP Use Distance: 10m Pairing Name: for KN318 Pairing: Blue LED Light Flashes Pairing Successfully: Blue Light Keeps on <style> .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }</style> 1 x Bluetooth&nbsp;USB Transmitter1 x 3.5mm Audio Cable 1 x Manual (Customer Satisfaction) - is our priority. If you notice any problems with the products after receiving the goods, such as damaged goods or incorrect quantity, please contact us immediately. We will do our best to provide you with satisfactory after-sale service.</br>