Meet the BRAVEN BRV-XXL: a large portable Bluetooth speaker with a built-in 15,600mAh power bank that plays your favorite music in any weather condition. The speaker has a water resistant, dirtproof and sandproof construction with a range of 33 feet. It has 4 audio drivers and 1 subwoofer. You get up to 14 hours of playtime on battery.
The speaker has a 15,600mAh battery that can be used to charge a smartphone and tablet. Its carrying strap has a bottle opener, which is nice. This rugged speaker is available for under $300 at this time.
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