Function features: 1. Car wireless Bluetooth music partner is a product you can insert TF card and U disk in at the same time to enjoy music from your storaged ecices through the car audio. There will be FM radio when using the home audio; 2. Support move next/move previous voice up/down stop/play function support phone call answering/hang up/call back function support mode switch: Bluetooth mode TF card mode U disk mode FM mode it can be placed anywhere comfortable in the dashboard; 3. Wireless Bluetooth technology incoming call and music mode seamlessly switch offset the microphone when callback internet data flow function can only support for those internet phones hand-free calls during driving in addition playing music in your phone through car speaker. Note:TF card support up to 16 GB FM 76MHz~108MHz (The specific frequency band depends on area FM can only reach local radio generally)