Amazon offers the Bem Range Strum Bluetooth Speaker in four colors (Sunset Brown pictured), model no. HL2515C, for $79.99. Clip the the $20 off coupon (located below the product price) to cut it to $59.99. With free shipping, that's $70 off list and the lowest price we could find. It features a built-in rechargeable battery, range of up to 40 feet, USB, and volume, bass, and treble knobs.