Black Sony portable Bluetooth speaker

I lost my black Sony portable Bluetooth speaker yesterday around 3pm in the parking lot behind the Walmart on 7th Street in Pittsburg. It's about the size of a paperback, with a rugged fabric-cased exterior and a small dent on the bottom edge. The speaker has a red fabric strap attached and a mountain sticker on the back. It’s important to me because I use it every day on my bike rides to listen to podcasts, and it was a gift from my sister, so I’d really appreciate getting it back.