... model of digital speaker:YM-DM802;Support SD/MMC Card,Mobile,USB Driver;Audio input,Suppot:MP3/ ... 2)Speaker Drive Unit:2" 4Ω,5w ;3)Frequancy Response:45Hz--18KHz; 4)S/N Ratio:<65dB ;5)SD card / USB / Mobile / ... MP3 / MP4 / PC / U Disc / Remote control ;6)Power,ON/OFF,VOLUME,LED,SCREEN,SD ... slot,DC port,7)Built-in SD/MMC card & USB slot, support SD/MMC card&USB ;8)Built-in LIN- ...