Instructables user mattthegamer463 didnt want to buy an expensive wireless guitar system so he modded a wireless mic setup he already had to do the job.

Wireless guitars are great, without cables to trip on the life expectancy of an energetic guitarist is greatly increased.  However, they are expensive, way more expensive than wireless microphone systems.  In fact, if youre like me, you might happen to come into a wireless microphone system for free.  Using it for your guitar is a ultra-simple hack that almost anyone can do in less than an hour.