Thank you for viewing. ■ Due to the nature of my main job, I may not be able to reply. Please purchase without comment or message. ■ Bundling discounts and price reductions are not available. This is a receiver that connects to a Bluetooth-incompatible audio/car stereo and allows you to listen to music from your smartphone wirelessly. ● Easy connection ・ Plug it into USB for power, and select "KN318" that appears in your smartphone's Bluetooth. ・ No need to install software. ・ Once connected, it will connect automatically from the second time onwards. ● USB and AUX dual output modes ・ Plug in the USB and select the car's USB mode, confirm the Bluetooth connection, and you can listen to music from your smartphone. ・ You can use AUX mode by plugging the included 3.5mm jack into the earphone jack. ※ We recommend this mode as it provides a more stable sound connection than USB mode and improves sound quality. ・ In AUX mode, you can use your mobile phone hands-free. ・ You can also listen to smartphone navigation information through your car speakers. ● High sound quality Better sound quality than FM transmitters. Deep sound quality thanks to calibration technology. ■ Product Details ・ Audio receiver ・ Size: 32 x 17 x 8.5mm ・ 3.5m AUX cable, 50cm ※ There may be a delay of about 3 seconds in USB mode depending on the car audio system you are connecting to. (This can be resolved by using AUX mode) ■ Shipping method: Standard mail ※ Estimated delivery: Approximately 3-5 days from the shipping date, delivered to your mailbox. (Scheduled to ship approximately 2-3 days after purchase) ■ Items are stored at home. ■ Please purchase without comment if you have no questions, so we can ensure a smooth transaction. ■ This is an imported product. ■ If there are any defects, please contact us before leaving a review, and we will handle the return. ■ If the item is returned due to an incorrect address, it will be resent with the recipient paying the shipping costs.