Tmvel Wireless Portable Bluetooth Waterproof Rugged 30 Watt Speaker - Sports, Beach, Pool, Gym, Indoors & Outdoors - Great Beat, Bass Surprising 30W output drops bold, rich resonant sound from a Compact body and 2 passive speaker,3 independent Chanel 5200mah Lithium ion Rechargeable battery plays up to 8-10 hours at 60% volume. Charge time 4 to 5 Hours Bluetooth 4.0 to wireless stream Hi-Fi audio anywhere you go from your smartphone or other device. Waterproof, Shockproof, Dustproof Rated IP55 for 100% protection against Water and Dust. Rubberized rugged exterior for ultimate impact resistance. Jaw-dropping Sound Quality and Volume - Equipped with two passive subwoofer and two 50 mm drivers, it'll deliver the rich bass and sound quality that you crave.