For Prime members only, Amazon offers the ION Audio Tailgater Portable Bluetooth PA Speaker, model no. iPA77, for $99.99. In-cart, that falls to $69.99. With free shipping, that's the lowest total price we could find by $29. It features frequency response of 77Hz to 20kHz, microphone, AM/FM Radio, USB, and Bluetooth range up to 100 feet.