Amazon currently has a deal on this Mpow Waterproof Bluetooth Speaker! It is regularly priced at $56 but on sale for $39.99. Then save an extra $10 by using the promo code KXXXLCZU! Thus making it just $29.99 and Free 2-day Shipping for Amazon Prime members, sweet! Not only does it play music but you can use it to charge your devices!
It has a power supply up to 1000mAh. As usual, prices on Amazon can change at any time so be sure to order yours before the price increases 
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