Caution: color: we ship according to the color of the first picture, in the package: If the quantity is not stated in the description, we will ship the item according to the quantity and model in the title.If the title does not have a quantity, it is 1pcs. Car bluetooth mp3 car bluetooth hands-free fm transmitter car mp3 bluetooth player the product is shipped based on the color or size of the main image of the product page. The appearance size is small and compact, and it is practical for most models. Support bluetooth 4.0/3.0/2.0 Device connection. Support operation voice prompt and caller id. Intelligent identification of various android and apple phones and other devices, usb charging, maximum output current 3.4A. Support fm full frequency point transmission function, a total of 208 frequency points. Support digital tube display. Support external tf card/u disk, support mp3/wma music format playback. Support answer, hang up, reject, call back and other phone functions. Supports echo cancellation and noise suppression cvc technology during calls. Support automatic power-off memory function. Support bluetooth stereo a2dp music playback. Features: name: car bluetooth player material: abs operating voltage: 12- -24v bluetooth version: 4.0 Launch distance: