Anker Soundcore Boom 3i Portable Speaker, 50W, Bluetooth, TWS, Ultra Deep Bass Sound, IP68, 16-Hour Playtime, Black The industry's first floating speakerWhile other speakers tilt or sag, Boom 3i automatically corrects itself to stay upright and keep the sound facing forward - even through waves. Double the bassExclusive BassUp™ 2.0 amplifies every beat, delivering deep 56Hz bass for a truly powerful listening experience.Note: Lab tests show that Boom 3i delivers a 3dB increase in bass power in the vocal frequency range (56Hz-20kHz) compared to the industry's leading benchmark - resulting in double the bass performance. 5x Saltwater ResistantBoom 3i is built for the elements - with a rugged housing and a protective coating that defends against seawater, sweat, and salt spray. While regular speakers can rust in less than 5 months, Boom 3i remains corrosion-free for up to 2 years of beach, boat and shore use. Note: Designed to withstand 240 hours of salt spray - 5 times the industry average. Lab tested under ASTM G85 equivalent conditions. Versatile Detachable Strap Grab it, stretch it or grab it and go. The secure, multi-functional strap keeps it light and easy to carry wherever you take it. Immersive Stereo Sound Pair two devices to split channels and enjoy richer, fuller sound all around you. Stay loud, stay safe Press and hold the BassUp button for 5 seconds to activate a 96 dB alarm. Clearly audible from up to 100 meters away. Be heard anywhereRecord a voice message and share it with your friends when you're out in the wild. Buzz Clean, clearer soundEnable Buzz Clean via the app to remove dust and debris, ensuring crystal-clear sound for every performance. Total control at your fingertipsCustomize your experience with EQ, BassUp 2.0, Buzz Clean, Emergency Alarm, Voice Amplifier and Lighting settings - all via the app.