Fangrui Product Details 1. Car Mp3 Bluetooth Player Fm Transmitter Multifunctional Car Charger, Model: 4.8a Black 2. Shell Material: Aluminum Alloy + Pc 3. Total Output: 15.5w (max) 4. Usb1 Output: 5v-3.1a (max) (smart Shunt) 5. Usb2 Output: 5v-3.1a (max) (intelligent Shunt, Play Mp3 Music) 6. Support U Disk Playback, Plug And Play, High-speed Reading Without Freezing 7. Memory Playback When Power Off, Automatic Connection When Power On 8. Voltage Real-time Monitoring, Driving Safer 9. With Blue Ambient Light, The Soft Light Is Not Dazzling 10. Dual Usb Smart Fast Charging, Automatically Match The Output Current 11. Bluetooth Hands-free Call, Built-in Microphone Call Clear And Smooth 12. Smart Constant Temperature Chip, Long-term Charging Without Getting Hot, Safe And Durable 13. With Led Display To Display Car Battery Voltage, Hands-free Calls, Fm Fm Transmission, Bluetooth 5.0 Lossless Connection, Music, Navigation Broadcast, U Disk Mp3 Player 14. Dual Usb Ports Supply Power At The Same Time 15. Built-in Management Chip, Intelligent Shunt Fast Charging Will Not Hurt The Machine 16. It Is Made Of Aluminum Alloy Material And Streamlined Shell Design Through 18 Processes Such As Cnc Machining, Polishing, Sandblasting, Oxidation, And Radium Engraving. 17. It Adopts 5-layer Circuit Protection Of High-performance Main Control Chip, Which Is Safer When Used Together. 18. Metal Elastic Contact Design, Suitable For Cigarette Lighters Of Different Sizes, Can Carry 12v24v Wide Voltage Input, Compatible With Most Models On The Market 19. Compatible With Wide Matching, Intelligently Adapting To Mobile Phones, Bluetooth And Tablets, And At The Same Time Satisfying The Charging Of The Main And Auxiliary Drivers 20. Weight: About 30 Grams 21. Dimensions: 3.4x4x6.5cm