Belkin Headphone Adapter

The iPhone’s headphone jack is recessed into the iPhone’s body, which means third-party headphones with larger miniplugs won’t work with this recessed jack. The solution is a headphone adapter that plugs into this recessed jack and then lets you use your headphones of choice. The smallest and simplest of the adapters we’ve seen so far is Belkin’s; plug it into your iPhone’s headphone jack, and you get a standard headphone minijack into which any 1/8-inch stereo miniplug — your run-of-the-mill headphone connector — can be inserted.–Dan Frakes