Pro King Public Address with a selfcontained portable PA system with a rugged roadworthy construction and a host of integrated features Builtin amplifier operating from mains or internal rechargeable battery powers a 12 bass driver and 1 compression driven A pair of included VHF handheld wireless microphones work in conjunction with the internal receiver two standard wired microphones can also be plugged in giving the user a total of four microphones Finally an auxiliary line input and integral USBSD media player allow for direct reading of MP3s from USB or SD cards iPods Laptops CD players can also be connected via the PAs RCA line input located on the rear of the unit A moulded handle and pole mount are included and a retractable trolley handle and rear wheels provide easy portability.