The 911 Phone from Shanghai Simcom Limited is a simple GSM phone that calls only one number – 911.  All you need to do is push the big red ‘911’ button for 3 seconds, and the device will call 911.  If the line is busy, it will even redial for you up to 10 times.

It’s a pretty simple solution that makes a lot of sense for, say, the elderly.  The device is also relatively small, so you can easily fit it into your pocket or even pin it to your clothing.