As one of its daily deals, ThingFling offers the refurbished Acoustic Research On-Ear Wireless Stereo Headphones, model no. AWD204, bundled with a mystery box for $23.99 with free shipping. That's a buck under our October mention of a refurbished pair of headphones bundled with a mystery box and the lowest total price we could find for new set by $16. (For further comparison, we saw these refurbished headphones without the mystery box for $3 less in November.) 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). Deal ends today.

Note: No warranty information is available.