Speaking of small phones that you can use in emergencies, DesignTech had a tiny cell phone able to call 911:
You wear it like a pendant, but it is a complete, single-purpose cell phone.
DesignTech had a number of other products on display. Everything from this simple little cabinet light up to driveway monitors and automatic starting systems for cars. Lots of gadgets, in other words.
For more information, visit DesignTech.