Even though it’s a little less than a pound in weight, this device is built with a 10-watt subwoofer and doesn’t skimp on the bass. Make sure your speakers are charged using a USB cable, and when you’re ready to go swimming simply unplug, connect to Bluetooth, and set afloat in your pool. Select from five color modes of LED lights to create a party atmosphere. You don’t want to immerse the device totally, though it is IPX7 rated, which means it is waterproof up to 30 minutes when submerged in up to a meter of water. For full clarity of sound, consider purchasing the company’s floating ring to keep all parts above water.