Definition: Given an Amazon customer review, write a title for the review. The preferred titles are under fifteen words.
Input: At just over $2, I wisely decided to order a pair of them.  Neither of them would work with my cordless mouse adapter, but that was a secondary issue; I was buying primarily for my keyboard.  One of them worked with my keyboard.  $4.50 was still the best price I saw, but had I known I'd have ordered three to increase the chance that I had a working spare.

Cheap enough to be worth it if you buy two.