Adorama offers the factory-refurbished Nikon WU-1b Wireless Mobile Adapter
, model no. 13186, for $19.95
with free shipping
. That's tied with our December refurb mention as the lowest total price we've seen. (It's $29 under the best price we could find for a new unit today.) 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.