Here’s a great stocking stuffer for anyone in the family that plays a guitar. The Strobe-e Keychain Tuner is a guitar tuner, flashlight and to top it off with a musicians feel, a bottle opener. To use the tuner, you have to shine the keychain on your guitar string, and if your string is moving, adjust the tuning knob until the string looks still. The small keychain runs off of one lithium battery, which is included. All yours for a mere $10.

Fender Keychain Tuner [think geek]