Thank you for viewing! This is a Bluetooth FM transmitter with a USB port. It's easy to use, allowing you to easily listen to your favorite music or audio from YouTube on your car speakers. It has two USB ports with a maximum output of 3.1A, so you can quickly charge smartphones with large-capacity batteries. It also has call answer/end functions, allowing for hands-free calls. It lights up in rainbow colors when plugged into the cigarette lighter, which is beautiful. --How to Use-- ① Connect this device to your car's cigarette lighter socket. ② Match the radio frequency of your car audio with the frequency of this device. ③ Connect your smartphone to this device via Bluetooth. With these three steps, you can play the audio from your smartphone on your car speakers. In addition, you can also play music from a USB drive containing MP3 files, etc. It supports 12V/24V cars, so it can be used in almost all cars available. 【Product Specifications】 ・FM Frequency Range: 87.5～108Mhz ・USB Output: 5V / 1A (left) ・ 2.1A (right) ・Weight: Approximately 30g ・Included: Main unit, instruction manual (English/Chinese) 【Other Notes】 We have confirmed the operation, but this is a foreign product. There may be scratches, etc. The product description is as described above. This product does not come with an instruction manual. However, it connects when plugged into the cigarette lighter socket, so there are almost no difficult operations. You will need to set up Bluetooth and match the FM frequency. We do not accept returns due to customer circumstances such as a different image, not knowing how to use it, or no longer needing it. To reduce shipping costs and the overall price, we will ship via Yu-Packet Post. Please note that we will ship it without the box. MP3 player, hands-free calling, fast charging, cigarette lighter socket