Dual USB car charger with Bluetooth FM transmitter for handsfree calling1、LED digital tube display can display frequency, song serial number and working status information. 2、Automatically detect car battery voltage, voice reminder, support instant voltage check. 3、Bluetooth smart MP3 player, support mobile phone / network / music APP software playback. 4、Just find an unoccupied station and the boosted FM signal and static‑cancellation technology broadcast a great listening experience. 5、Solid Bluetooth and FM connections stream music straight from your phone to your car’s sound system. 6、Support mainstream map APP navigation voice broadcast and support for QQ / WeChat other software language playback function. 7、Support lossless audio decoding, high resolution, high performance stereo, support multiple lossless music formats such as WMA, APE, FLAC, WAV. 8、Support memory card and U disk extended playback, support key operation to switch folder playback, support playback breakpoint memory function. 9、Latest version 5.0 Bluetooth chip, more stable connection, faster automatic connection. 10、Dual USB ports with dvanced technology deliver simultaneous high‑speed charging to driver and passenger. 11、Knob design, one‑key operation to adjust volume / answer / hang up / call back.