AnkerDirect via Amazon offers its Anker SoundCore Dual-Driver Portable Bluetooth 4.0 Speaker in Black for $29.99. Coupon code "UVQH8VHF" drops it to $26.99. With free shipping, that's tied with our mention from three weeks ago as the lowest price we've seen. (It's the best deal today by $12.) It features enhanced bass, 24-hour playback time, and built-in microphone.