With an average of 4.5 out of 5 stars from a staggering 12,000 reviewers on Amazon (see reviews), this portable Bluetooth speaker from DKnight lists for $99.99, but is currently discounted 76% to just $23.99 (see on Amazon).
Two highly powerful 40mml total 6W acoustic drivers and ultra-small size produce a wide audio spectrum on the DKnight Magicbox speaker. It supports wireless streaming via Bluetooth 3.0, has a rechargeable Li-Ion battery for up to 10 hours play time (which some reviewers have noted is replaceable), has a built-in microphone for making hands-free calls, and has an audio-in jack for making hard connections as well.
Reviewers seem to indicate that this unit delivers huge sound for its extremely low price point. See this deal now and review buying options at Amazon.