Its hard to find anything decent in the electronics department for roughly $20. Even a decent phone case will cost you more than that. Right now, however, Walmart has one of Ankers Soundcore waterproof Bluetooth speakers for just $20.99. For that price, it might be worth buying a couple and stashing them away as gifts. Or, build a whole wall of them in your backyard and play sludge metal at maximum volume to annoy the neighbor who keeps raking all their leaves onto your lawn every year (we know youre doing it, Brenda). However, this is a limited deal, so grab it while its available.Anker Soundcore Bluetooth Speaker With IPX5 Waterproof $20.99 (was $29.99)AnkerSee ItLooking at the spec sheet, youd never guess you could get this speaker for $21. It has Bluetooth 5.0 for connectivity, so it can receive a signal from up to 66 feet away. The built-in battery lasts up to 24 hours on a single charge, depending on usage. And its IPX5 rated, which means its not afraid of a little rain or being splashed at the pool. It even has simple tactile controls on top, so you can adjust the volume without accessing your phone. That makes it a great party speaker, especially since you dont have to worry about it breaking.The post Ankers fully waterproof Bluetooth speaker is just $21 right now appeared first on Popular Science.