Description:Adopting adjustable volume and 10 meter transmission distance design, this transmitter can well satisfy your different needs and is more convenient for you to use.Thanks to compact size design, it is easy for you to carry and will not take up too much space to store.Made of high-quality ABS material, it is durable and practical.The length of this adapter is 3.22cm and the width is 1.73cm.The USB interface is used for power supply, the product can be inserted in the output voltage of 5V USB interface when using.Item Name: FM TransmitterMaterial: ABSBluetooth-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(5V)Features: Compact, Portable, Hands-free CallSize Details: 3.22cm x 1.73cm/1.27" x 0.68" (Approx.)Notes:Due to the light and screen setting difference, the item's color may be slightly different from the pictures.Please allow slight dimension difference due to different manual measurement.Every time you adjust the FM frequency band, you should set it before Bluetooth-compatible pairing, and you cannot adjust it after Bluetooth-compatible pairing is successful.The default frequency band of FM01 is 95.0MHZ, which can be used directly. If the playback noise is large, it can be adjusted to other frequency bands.Turning on the radio of some models will cause the car's built-in USB port to power 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 of the ignitor, car charger, etc. Power supply on the interface (USB output voltage must be 5V).FM01 may be too noisy or unusable when used in some original cars with USB interface. It is recommended to plug FM01 into the ignitor car charger.FM01 has no automatic shutdown function. It is recommended to unplug it from the USB interface when not in use.When FM01 cannot be searched in the Bluetooth-compatible settings of the mobile phone or when the search cannot be paired, 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. Multi-function Buttons:1. Adjust the FM frequency. After the product is powered on, and before Bluetooth-compatible is paired, click the button to change the FM frequency(a total of 87.5MHZ, 95.0MHZ, 103MHZ three frequencies can be selected).2. When playing a song, click the button to pause and play.3. Answer the call: When someone else calls in, you can click the button to answer the call.Usage:1. Plug the FM01 into the USB interface of the car, whose output voltage is 5V.2. Set the FM frequency band by clicking the button, then turn on the car's radio, and adjust the FM frequency band of the radio to the same as FM01.3. FM01 has an FM frequency automatic memory function, and each time it is powered on, it will default to the FM frequency when it was used last time.4. After the FM frequency band is set, find the Bluetooth-compatible pairing name: FM01 in the Bluetooth-compatible settings of the mobile phone, and click to pair. Then the mobile phone will play the music on the speaker of the car.5. Adjust the volume: when you are playing music, you can adjust the phone's music volume to the maximum. The car volume is adjusted to moderate. It is not recommend increasing the car volume too much, because the louder the car volume, the more serious the noise and distortion will be.Package Includes:1 x FM Transmitter