I. Specifications:Product name: USB Bluetooth-compatible FM transmitterItem model number: FM01Bluetooth-compatible version: V5.1Working voltage: 5VEffective probability: within 10 metersAudio output: FM transmitterDefault frequency: 95.0MHZSignal-to-noise ratio: 95dbAnswer the call: supportAutomatic return: supportPower supply mode: usb power supply 5VII. Features:1.USB interface: The USB interface is used for power supply. When in use, this product can be inserted into the usb interface with an output voltage of 5V, for example: the car comes with a usb interface 5V, and the car charger interface 5V.2. Multi-function button: Adjust FM frequency. After the product is turned on and before Bluetooth-compatible pairing, click the button to change the FM frequency 3 frequencies of 87.5MHZ, 95.0MHZ, 103MHZ are optional; when playing a song, click the button to pause playback; answer the call: when someone calls, you can click the button answer the phone.3. This product is mainly used in car scenes, using the latest Bluetooth-compatible 5.1 technology and mature FM technology, allowing car fans to easily enjoy car wireless music.4. No audio cable is required traditional Bluetooth-compatible receivers basically need audio cables, which leads to clutter in the car, no delay, no lag, good compatibility, and basically all cars and mobile phones can be used.5. Through the improvement of appearance and structure, the size of the product is compressed, making it small and miniature.6. After-sale Service: If you have any questions, please contact us immediately and we will help you solve it as soon as possible.III. Operation Guide:1. Insert the FM01 into the car usb interface with an output voltage of 5V.2. Click the button to set the FM frequency band, then turn on the car radio, and adjust the FM frequency band of the radio to be the same as FM01.3. FM01 has an automatic memory function of FM frequency, and each time it is powered on, it defaults to the FM frequency when it was last used.4. After the FM frequency band is set, find the Bluetooth-compatible pairing name: FM01 in the Bluetooth-compatible5. Adjust the volume: When playing music, you can adjust the music volume of the phone to the maximum, Adjust the volume inside the car to a moderate level. It is not recommended to turn up the car volume too loudly, as the louder the car volume, the more noise and distortion will be.Tips:1. Every time you adjust the FM frequency band, you must set it before Bluetooth-compatible pairing. You cannot adjust it after Bluetooth-compatible pairing is successful.2. The default frequency band of FM01 is 95.0MHZ, which can be used directly. If the playback noise is loud, you can adjust to other frequency bands.3. Turning on the radio on some models will cause the built-in USB interface of the car to be powered off. At this time, if the FM01 is plugged into the built-in USB port, it cannot be used. In this case, you can plug the FM01 into the USB interface of the cigarette lighter, car charger, etc. to supply power the USB output voltage must be 5V.4. FM01 may be too noisy or unusable when used on some original cars with USB ports. It is recommended to plug the FM01 into the cigarette lighter car charger.5. FM01 has no automatic shutdown function. It is recommended to unplug it from the USB port when not in use.6. When the FM01 cannot be searched in the Bluetooth-compatible settings of the mobile phone or the search cannot be clicked to pair, it is recommended that you clear the previously connected Bluetooth-compatible devices in the mobile phone, and then restart the mobile phone and try again. Package List:1 * Transmitter