Altatac via eBay offers this Portable Rechargeable Bluetooth V2 Speaker with 3.5 Audio Auxillary Jack in five colors for $9.99 with free shipping. That's $4 below the lowest total price we could find for a similar unit elsewhere. It is 1.85" tall and features USB charging, 20Hz to 20kHz frequency response, and a lithium-ion battery.
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