The Aquatic AV AQ-MP-5UBT-S media player connects to smartphones and MP3 players via Bluetooth. It supports Apple and Android devices and is ready for Sirius XM satellite radio. An internal USB charges devices, and a surface USB socket connects flash drives and cables. A built-in 288-watt amplifier powers as many as eight speakers or a combination of speakers and subwoofers. A 3-inch LCD shows track data, songs, artists and more. $419. Aquatic AV, San Jose, California, (877) 579-2782. aquaticav.com
This article originally appeared in the August 2017 issue.