... ,WMA 3.USB,TF CARD connection 4.support AUX In,FM Radio 5.built-in li-ionbattery Specifications& Features:◊ Specifications SPK ... -18KHz Output 3.7V 800mAMultifunctionUSB,TF CARD connection supportAUX In,FM RadioBuild-in Lithium Battery withCompatible with devices MP3/4player, Mobile ...