MODEL:PP-3315 WE CAN ADD AMPLIFIER AS YOU NEED, THE WONDER SOUND QUALITY ... function USB/SD SLOT,LCD SCREEN, EQ, DC Amplifier(E) PP-3315AUS-BTSpecial function USB/SD SLOT,LCD ... SCREEN,BLUETOOTH,FM Amplifier(F) PP-3315AUS-IPODSpecial function USB/SD SLOT, ... function USB/SD SLOT, LCD SCREEN,EQ,IPOD HOLDER,GUITAR INPUTAmplifier(H) PP-3315AUS-FMSpecial function USB/SD SLOT ...