With FM function, can search radio station broadcast automatically. Support TF card ( Max to 64GB, TF card not included ), USB and AUX input, can decode and play MP3 format audio. Micro USB charging and built-in lithium battery, smart and fast charging. Built-in microphone for hands-free call. When playing music ( TF card / USB flash disk / Bluetooth ) , press short for button play / pause, under Bluetooth mode, press once to answer a call, press again to hand up, press twice to ring up a call, press long to disconnect Bluetooth. ( in FM mode, press short to search station automatically, press again to stop searching ). Play music after pairing with Bluetooth device for example mobile / MID / TV, the working distance is within 10M. Notice: The black of bluetooth speaker, two colors ( black and red ) in the corner of logo are shipped by random.