CRAFTED DESIGN, CRAFTED SOUNDThe GravaStar Mars Pro is created for music lover. The Bluetooth speaker has built-in, exclusive DSP audio algorithms that give you a deep bass, accurate mids, and crisp highs. Combined with an equal-loudness contour, you get a powerful sound experience. Incredible Stereo Sound & Powerful Deep Bass SpeakersThe volume of mars pro is tuned by the international acoustic master Gates, even at low volume, it can stably output high-definition deep bass Built-in 2 subwoofers and 2 tweeters, loud and undistorted treble, and deep and delicate bass, the loud speaker like being in front of the artist, next to them in the studio or on stage. bringing you closer to the music. You have to hear it to believe it. 20H Powerful BatteryGravastar Bluetooth speaker portable wireless built with a high power capacity super electric vehicle battery, can be recharged more than 1000 times, and the maximum actual capacity will not be reduced. Compared to the 300 times rechargea