Guitarists are going to want to pay extra close attention to the Guitime Watch. The Guitime Watch, designed by Elvis Fung, is a watch designed specifically for those who play guitar.
The watch has a dual-display which tracks the time and the beats per minute (BPM) of your guitar. The watch also has a built-in metronome and a slot for a pick.
Watches are often designed for certain audiences, but it isn't often that you see a watch designed solely for a guitarist. Even a non-guitar playing person such as myself is impressed with the design of the Guitime Watch. Anything that is highly portable (such as a watch) and helps you play an instrument better (such as this watch) is okay in my book.