Lenovo offers its Lenovo BT820-US Bluetooth Speaker, model no. 0B54211, for $79.99. Coupon code "BFCM4211" cuts the price to $26.99. With free shipping, that's tied with our mention from three weeks ago and the lowest total price we could find by $4. This 2-channel unit features two speakers and a 3.5mm jack; it can be powered by the included AC-DC adapter or four AA batteries (not included). Deal ends December 18.