Description: Meaningful Tool: This car radio USB adapter has a LED screen,you can easily see the radio channel name,type and current time etc. Easy to Use: Easy to use,it features a lighter plug,just plug it in the car socket, and it will be powered. Useful Function: It can scan the channel and store the channel,it features a knob and a button,is convenient for you to use. Special Design: There is a USB port on the side, it can provide power to the car DVR, and can charge the phone, tablet battery. Fine Workmanship: The knob is designed with a groove on the surface to prevent slip,and the surface is comfortable to touch and easy to be cleaned. Comes with within over-current for protection, over-voltage for protection, intelligent temperature control, short circuit for protection. Specification: Color: Black. Material: PC. Car charging Size : Approx. 6.65*3.86cm/2.62*1.52in. Vehicle launcher size: 6.3*5.65*2.68cm/2.48*2.22*1.06in. Product input: DC 12-24V. Output of PD-1 :5V=3A 9V=3A 12V=2.5A 15V=2A 20V=1.5A. QC3.0 1/2 Output :5V=3A 9V=2A 12V= 1.5A. QC3.0-1+QC3.0-2 Output :5V=4A. PD+QC3.0 1/2 Output :5V=4A. Total output :30W. Note: There might be a few color distortions due to different computer resolutions. There might be a slight error due to different hand measurements. Package Includes: 1 Piece Car Adapter (with 1 Piece User's Manual).