1.Good appearance,fashion and dignity, seems to build into auto meter. 2.The color LED can display 200 emit-frequencies, enhanced emit-frequency let frequency more stabile,and the tone more clear, as beautiful as CD. 3.it can built-in flash or connect U flash disk or MP3 player to play music. 4.remote control function Operation instruction: 1.put our product plug into igniting-cigarette device's socket,and adjust fitted emit frequency 2.setting the FM frequency as the our product's 3.operating the product key then you can share your favor music with others