This ION Audio Sport Go Tailgate Portable PA Speaker originally $79.99 drops to only $49.99 at Best Buy. You save 38% off the retail price for this portable PA speaker. Plus, this item ships free. We could not find a better price for this item online. The ION Audio Sport Go Tailgate Portable PA Speaker features a 4″ woofer, 2-way speaker, rechargeable battery, built-in bluetooth, and 20W peak power. Sales tax is charged in most states. Deal expires January 5, 2020.