Specifications: 1. Shell material: ABS 2. Shell surface technology: fine lines, high gloss 3. Features: Appearance patent. Large white screen, separate voltage display 4. Input: 12-24 5. Output: 5V-1.0A or 5V-3.0A 6. Total power: 7.5-20W 7. Output port type: USB, type-c 8. Protocol: Bluetooth 5.0 9: Hardware functions: FM transmitter, Bluetooth, USB charging, reading U disk, color lights, EQ function Features: Support ambient light Support Battery voltage detection Support Auto power off memory function Support FM stereo transmission technology Support U disk playback Support WMA, MP3, WAV, FLAC music format files Wireless support A2DP, AVRCP, HFP, HSP Wireless support hands-free calls Support Wireless compatible stereo music DSP technology Dual USB 3.0A 1A, Tpye-c quick charge One key EQ,Dual screen display. Package Includes: 1x Car Bluetooth FM Transmitter Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.