SSA-160DP 160 WATTS WITH BUILT-IN DIGITAL PLAYER MEDIUM WATTAGE AMPLIFIER 5 Mic & 2 Aux Inputs. Built-in MP3 player with remote control for USB, SD/MMC card reader. Preamplifier and Line Output for connecting to a Booster Amplifier and for recording the programme. Line Input for connecting the output from any external mixer or permitting SSA-160DP to be used as a Booster Power Amplifier. Resettable circuit breaker for protection against overload and short circuit. Instant transfer to DC power (Car Battery) if AC power fails. Box Speaker/Driver Unit selector switch. Bass boost defeated at Driver Unit position for safer operation of driver units.