As one of its daily deals, B&H Photo Video offers the Denon Commander Sport Portable All-In-One PA System with Wireless Microphone for $299 with free shipping. That's the best price we could find by $200. Deal ends today. Features include:

8" woofer and 3" tweeter

built-in handle and rolling wheels

40-hour rechargeable battery

Bluetooth 4.0

USB and SD card slots