Super portable and extremely durable, the red-colored Ultimate Ears BOOM 4 Wireless Bluetooth Speaker from Logitech is ready to deliver balanced 360? audio and deep bass by the pool or anywhere you're hanging out. By the pool, you don't have to worry as the BOOM 4 is waterproof, can float, and even be submerged in up to 3.3 ' of water for up to 30 minutes.