Adorama offers the factory-refurbished Nikon WU-1b Wireless Mobile Adapter, model no. 27080, for $24.95 with free shipping. That's $4 under our January refurb mention and the lowest total price we've seen. (It's a current low for a refurb by $5; new ones go for nearly twice as much.) For use with the Nikon D600 DSLR or other select Nikon DSLRs, it allows you to control your camera via most iPhones and Android smartphones, transfer images between your phone and camera, and preview/compose images on your smartphone. A 90-day Nikon warranty applies.