Today only, ThingFling offers the refurbished Acoustic Research On-Ear Wireless Stereo Headphones, model no. AWD204, bundled with a mystery box for $19.99 plus $6 for shipping. That's tied with our November mention for this bundle and $33 under the lowest total price we could find for a new pair of these headphones today. Features include 900MHz wireless sound up to 150 feet, 30mm drivers, frequency response of 20Hz to 20kHz, up to 6 hours of battery life, and more. They're powered by two rechargeable AAA batteries (included).

Note: No warranty information is available.