Weighing in at a smart 19 lbs, the PRA-8000\/PRA8-7 contains a 40 W Solid State amplifier matched to an 8 built-in speaker, knocking out more strong, clear sound than any in its class. The included wireless headset mic will broadcast effortlessly up to 100 ft away from the receiver. The control panel also includes an input for wired microphones, as well as auxiliary inputs for MP3 and other media players. Sync your smartphone directly to the sound system through built-in Bluetooth technology or play MP3 files through a built-in USB port. The unit even includes an SD\/MMC port. Operates via AC plug, or can be used remotely for up to five hours with its built-in rechargeable battery. Additional wireless handheld microphone included with purchase.