The Polk BOOM Swimmer Bluetooth Speaker is a great take-anywhere waterproof speaker that will keep the tunes pumping no matter what you’re doing. It’s also dust and shock-proof so it can withstand everyday life. Features include stero linking which is something that’s becoming fairly regular these days for great reasons. Link multiple speakers together for greater sound and to have a true left and right. Another feature that really draws me to this little speaker is the loop that attaches to just about anything so you can hang or latch your speaker in the perfect spot. You can also put a suction cup on to stick it in the shower or on the boat deck. What seals the deal here is the price that ranges from $50-60 depending on the color – black, blue, green or orange.