【Incredible Stereo Sound & Deep Bass Speakers】-- Monster's unique Pure Sound technology from 40 years of sound engineering is fine-tuned to deliver the most impactful music experience possible. 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. 【Up to 24 Hours Playtime with High-Capacity Battery】-- Built-in high-capacity 20,000mAh Rechargeable Battery supports up to 24 hours of playtime at 50% volume. This outdoor Bluetooth speaker has a charging function, and it only takes 3 hours to fully charge. (Play time varies according to volume and audio content) 【IPX7 Waterproof】 -- IPX7 Waterproof and shockproof makes wireless speaker suitable for outdoor activities. Take this big speaker to your cruise ship, riding, boating, or party. A good choice for your moments of relaxation, no worries about weather and outdoor condition, keep the music on your way. 【100W Powerful Stereo Sound】 -- Get a 100w (120w peak) output power produces punchy bass and true HD sound, the loud bluetooth speaker can deliver amazing sound, allowing you to feel the body-shaking experience of the Monster Adventurer Max! 【Advanced Bluetooth 5.0 Connection Technology】-- Bluetooth 5.0 technology provides fast and stable signal transmission (connection range of 100 feet). TWS mode supports the connection of 2 speakers at the same time allowing you to experience the immersive auditory feast. 【Multiple Playback Modes】-- 5 kinds of audio input give you more audio options to customize your favorite tunes, Bluetooth 5.0/ AUX / Micro SD Card / USB / Microphone Input. The powerful Bluetooth speaker brings vivid sound to life for a fantastically dynamic Audio experience. 【Portable Bluetooth Speaker & Removable Baldric Included】-- Ergonomic all-in-one handle design makes the speaker can be easily lifted with one hand to take it anywhere. For the sake of humanization, the wireless bluetooth speaker includes an extra adjustable tear-resistant shoulder strap for more easy portability and is designed for active families and people on the move, catering to your needs throughout the day. 【Widely Used for Outdoor Scenes】-- The outdoor waterproof speaker gives you the choice to party from pool to shining sea and everywhere in between. NOTE: Press and hold the button to switch the indoor/outdoor sound mode. 【What You Get】 -- Monster Adventurer Max Bluetooth Speaker*1, USB-C charging cable*1, AUX cable*1, Baldric*1, Quick Start Guide*1. If any issues with this speaker, please let us know at anytime, we will figure it out as soon as possible.