Take this Bose Soundlink Micro Speaker in Dark Blue to the pool, beach or anywhere you want to play music.  It's waterproof and easily portable.  Its rechargeable battery lasts up to 6 hours, so the music keeps on playin'.  It even has a built-in speakerphone for taking calls out loud and can voice access to your phone's Siri or Google assistant.

size = 3.87 x 1.37 x 3.87 inches

weight = 0.64 lb