15 cool, incredibly tiny tech gadgets for your keychain

Forget superthin Ultrabooks that can fit in your purse -- these tiny gadgets can fit in your pocket with room to spare
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High-tech keychains

Technology has come a long way from the giant, warehouse-size computers of yesteryear. In fact, technology has come so far that tons of super-advanced devices can fit right on your keychain. Here are 15 high-tech keychain devices, from Wi-Fi signal finders to GPS devices to tiny cameras and digital photo frames.

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