Anker Boom 2

80W Max Booming Bass: Feel the power of the bass in every song thanks to a racetrack subwoofer for added depth and clarity. And with BassUp 2.0, you can tweak the bass EQ and increase the output from 60W to a staggering 80W max. 2.1 Stereo Clarity: A 50W racetrack subwoofer and dual 15W tweeters deliver crisp highs and deep bass, balanced by smart crossover technology, for an immersive audio experience. Listen All-Day Anywhere: Boom 2 outdoor speaker keep the beats playing for 24 hours on a single charge, and with the built-in power bank, you can keep your phone powered up wherever you are. (Playtime may very based on volume level and playback content.) IPX7 Waterproof and Floatable: Boom 2 outdoor speaker is designed to handle any adventure, so you can listen worry-free at the beach, by the pool, or in the rain.