Bringing an audio speaker into the bathtub with you used to be, well, inadvisable. At best. And many of those portable Bluetooth speakers that boast of being waterproof are only seaworthy to a point. Then there is Anker’s Soundcore Select 4 Go Bluetooth Shower Speaker, which rocks a degree of waterproofing so great that it floats. Skeptical? It’s worth a $20 bet to find out, which is what the Soundcore Select 4 Go is selling for right now at Amazon during a 39% off sale. We’re not advocating that you make using the Soundcore Select 4 Go in your bath or pool as a regular habit, but should an accidental dunking occur, the Soundcore Select 4 Go can be immersed in up to 3.3 feet of water for up to 30 minutes without damage. It’s barely half a pound in weight and has a built-in loop for your showerhead, handlebars, carabiner, or anything else you want to attach it to for great sound on the go without fear of the elements. See at Amazon Big Sound, Little Speaker The hand-sized Soundcore Select 4 Go cranks out 5 watts worth of clear, beautiful sound from any Bluetooth device you choose to pair it with. It’s USB-rechargeable with the included cable, and a full charge gets you 20 hours of listening time. Even after 300 charging cycles at max current, the Soundcore Select 4 Go’s battery retains 95% of its performance. Between that and its amazingly durable construction, this should provide years of portable listening. You can also double your pleasure by pairing two Soundcore Select 4 Go speakers to your Bluetooth device — they’ll assume stereo separation with one taking on the left channel and the other one the right channel. This 39% off Amazon deal is the perfect time to grab two Soundcore Select 4 Go speakers and set them up for clear, long-lasting, budget-friendly stereo sound. Take It Anywhere The Soundcore Select 4 Go has “shower” in its name, and it is indeed a perfect shower speaker thanks to its long battery life and IP67 waterproofing. But it’s also ideal for the beach or a day out on a boat — remember, in case it goes overboard, it floats — or clipped to handlebars or a backpack for a day of outdoor adventuring, because it’s also rated IP67 for dustproofing. It work equally well indoors in a dry room, but when you have this kind of insurance against the elements, that almost seems like a wasted opportunity. The Soundcore Select 4 Go comes in six colors, but only the black model is part of this 39% off Amazon deal. When you can save $13 and the performance is identical, why be picky about the color? Head to Amazon now and lock in a summer of outdoor tunes free that will last regardless of the elements. See at Amazon