If you were to ask us to design an ultimate keychain, we'd probably shove RFID, Bluetooth, USB, and some flash memory in there. If you asked a crazy person to design a keychain, you'd get the Power Whistle.

This "keychain" has a rape whistle, an LED light, a compass, and a thermometer, for the times where you're being sexually attacked by a bear in the woods and you need to find your way back to civilization in the dark. Oh, and you'd like to know how cold it is.

Product Page