100% Waterproof and dustproof - meets IP67 international standards, no worries with rain, dirt or snow, drop the EcoBoulder+ in your pool, lake or ocean, no worries - it floats Double up the sound with EcoConnect that allows the connection of 2 EcoBoulders (mono or stereo mode) within 30 feet of each other; Bluetooth 4.1 allows you to stream from up to 100 feet away Audio sources include Bluetooth, AM or FM or wired aux in connection; Play on standard AC wall power for continuous, or unpled on built in battery for up to 10 hours at full volume; Up to 100 hours 100-Watts dynamic power amplifier for massive sound with built-in 2 band bass and treble equalizer; 5 factory preset equalizer settings and proprietary audio DSP chip Waterproof removable storage compartment allows you to keep your phone and accessories dry; External microphone jack for PA or Karaoke function (mic sold separately)