Car Bluetooth-compatible 4.2 FM Transmitter Wireless HandsFree FM Radio Adapter TF Card Pendrive MP3 Player 3.4A Dual USB Charger Description: 1. 3.4A(MAX) Smart fast charge 1A charging port: USB flash drive playback/charge devices such as mobile phones and tablets 2.4A charging port: It can fast charge digital devices, such as large-screen mobile phones and tablets 2. It supports hand-free phone call when connect with the phone via Bluetooth-compatible Answer/ HANG up: Click to answer/long press to reject Double click: Redial the last number in the call history 3. Connect with the car via FM or Bluetooth-compatible to play music or answer the call 4. After power off and restart, it can memorize the FM frequency, the track and the play mode before it power off. Match the frequency of the car radio with the MP3 frequency inset the USB flash drive to play music 5. It supports phone navigation broadcast, one-click Bluetooth-compatible connection and more accurate voice navigation broadcast 6. Lossless Audio hard recoding: High resolution, high performance stereo and supports multiple audio modes 7. Constantly charging 8. Improved non-slip shrapnel on both sides ensure stable charging even on bump roads 9. 12-24V vehicle models: this product supports 24V large trucks. Most products on the market can not be used on 24V large trucks! (this product does not support excavators) 10. Well-designed appearance presents compact size with minimalist aesthetics Feature: Car charger Bluetooth-compatible MP3 Bluetooth-compatible 4.2 Double USB charging Navigation/music playing Voice calls USB flash drive/TF card playback Super quality Widely compatible Voltage monitoring Two phones: Intelligent distribution of current enables it quickly charge two devices at the same time Why is there a noise: When the car FM is affected by the channel of other radio stations, it will produce noise. It needs to be adjusted to the channel without radio interference, and the noise is as small as possible. Then connect the car Bluetooth-compatible receiver and play music to enjoy the high-definition sound quality. If there is any further problem please contact our customer service first. We will offer you solution. Steps of connection: 1. Insert into cigarette lighter socket 2. Bluetooth-compatible pairing 3. Synchronize FM frequency 4. Phone music playback Note: There may be slight size deviations due to manual measurement, different measuring methods and tools. The picture may not reflect the actual color of the item because of different photographing light, angle and display monitor. 1 X Car Bluetooth FM Transmitter