High-fidelity ， high-resolution stereo effect ，  DIGITAL， PLL lock-in technology
LCD screen display， more intuitive to tune frequence
Blue backlight
Full range of frequency (88.1 ~ 107.9MHZ)
Store the last frequency used 
Cigarette lighter power supply with USB port
3.5mm audio input interface suitable for the full range of 3.5 headphone audio jack
Car Transmitter Instructions
Plug it into the phone 3.5mm audio jack and play music
Turn the car radio or other device with a radio function on， and with frequency tuned to a radio station ， such as 88.1MHZ
Press the arrow keys to adjust the frequency on the product and make the transmit frequency to 88.1MHZ
Now your car radio should paly the sounds of music from your phone. 
Long working time.