We previously reviewed Belkin's Headphone Adapter, the first product we'd received for using third-party headphones with the iPhone's recessed headphone jack. We've since received RadTech's $7 version, officially known as ProCable - Audio Extension Cable 3.5mm Male - Female. I'll it call "adapter," for short.

Like Belkin's solution, RadTech's adapter plugs into the iPhone's recessed jack and then provides a standard headphone minijack for connecting your favorite headphones; it worked well with a range of third-party headphones. However, whereas the Belkin adapter is short (two inches), thick, and rigid, RadTech's is 6.5 inches long overall with a thin, flexible cable in the middle.

Although it doesn't feel as sturdy as Belkin's Adapter, the RadTech cable is less restrictive; its short plug isn't much longer than that of the iPhone's stock earbuds, so you don't have to leave additional clearance at the top. On the other hand, one downside to the RadTech adapter's more-flexible design is that the weight of its headphone-jack "pod" tugs on the end of your headphone cable a bit.

Although I was impressed with the build quality of the Belkin adapter, I think the lower price and flexible design of the RadTech ProCable makes it more appealing for everyday use.--Dan Frakes

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