Top Selling Bluetooth 5.0 USB MP3 Player Car Charger FM Transmitter 5V /2.4A Handsfree Carro Music Receiver Car Accessories     Features:         Wireless transmit phone call from Bluetooth mobile phone to the car FM stereo system.       Dual USB charging ports: QC3.0 + 5V 2.4A, Suitable for iPod/iPhone/iPad and other mobiles, save time.       Real-time monitor of the car battery voltage, the voltage of the car will display on the FM transmitter after you start the car, the alarm will warn you if the voltage under 12V.       Mobile navigation information broadcast, make is clearer without looking the phone screen, safer driving experience.       With automatically calling-number system.       Support TF card(MP3/WMA format, MAX 32G), A2DP function       Strong and elegant design with white letter display, easier to look in night.       Auto-switch between music playing mode and Bluetooth hands free mode.       Flexible metallic hose can be banded and adapted for any type of autos.       Draws power from sockets in the car 12-24V.       1.7'' large screen make it easier to look the letters.       Go-ose Neck Design: Flexible metal hose, Convenient to adjust its direction and find better viewing.       Support SIRI Function: Long Press the big button 2 seconds to open the function.           Specifications of bluetooth FM Transmitter:         bluetooth version: V4.2 + A2DP       Frequency range: 87.5-108.0MHz       Frequency stability: ±10ppml       Product Input: 12-24V       Charger output: Quick 3.0 Fast Charger, 5V/2.4A       Music Format: MP3/WMA       TF Card Max capacity: 32GB       FM Transmit Distance: about 2-3M       Bluetooth Distance: about 5-10M          User Tips of bluetooth FM Transmitter:         Suggest that RAM less than 32GB. Larger than 32GB which may cause the abnormal reading.       To protect this device, we recommend to remove it from outlet after use, to avoid instant high start voltage damage the FM transmitter.       If you want to charge the phone and listen to the car radio at the same time, please note that your radio frequency and our device's frequency do not get too close.       It is a normal situation that FM Transmitter product will have some noise because of the interference of the local radio signal. Find a empty frequency and set our FM Transmitter to the same empty frequency for minimized static noise.       In order to achieve best audio quality, please set the volume on your phone or the device to maximum and then adjust the volume for your car stereo; NOT suggested to adjust volume of your car speaker to maximum (it will bring lot noise).       Our products support the use of 12-24V normal battery in the car/truck/bus, we recommend that you do not use the Bluetooth FM transmitter in car/truck/bus that modified the battery. This may cause burned because of instantaneous high current.          Package Included:         1 x FM Transmitter with QC3.0 Fast Charger       1 x 3.