... card, U disk(max.:16G).Can be connected to audio output device: mobile phone, MP3, MP5, PC,etc.Support remote control function ... .Technology Specification:Output Power:RMS 6W(3W+3W) THD=10%.Frequency response:150 ... .W.: 22/21kgs.Accessories:Remote controller, USB cable, audio cable. wireless wooden speaker for smartphone,cell phone,pc,mp3,etc