The Sony SRS-XE200 X-Series Bluetooth speaker is 48% off ahead of Prime Big Deal Days. It comes with a corded strap, making it easy to tote around on your adventures. With a IP67 rating, it's water- and dust-proof, giving it a rugged build. Not to mention the 16 hours of battery life that keep the party going all day.

A speaker that offers dazzling clarity and rugged convenience for less than $50 is hard to come by, but this little speaker is ideal for those looking for on-the-go listening. Even if you aren't the outdoorsy type, the IP76 waterproofing means that you don't need to worry about water damage in the shower or accidental splashes in the kitchen.

At Engadget, we’ve tested scads of audio equipment. In our guide to the best Bluetooth speakers and smart speakers, we break down which, out of the thousands out there, are worth your money. Not surprisingly,