Monster Adventurer Boombox is a 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. Product Specification: - Bluetooth version：BT5.3 - Distance：~30 M - Speaker size：4”x1/2”x2 - Battery capacity：11.1V/4000mAh - Output power：120W(Peak) - Charge time：5V/2A~6H - Charge time：12V/2A~3H - Play time：100%~30H，50%~10H - Product weight：~8kg - Colour：black - Product size: 399x160x214mm - Function：BT/AUX IN/USB/(PowerBank)/TF/MIC/Live/ monitoring - Remote control/karaoke - Without box: 432x189x258mm and outside box:605x460x300mm