JOYO JGE-01 Infinite Sustainer for Guitar and other steel string inst (E-Bow) 

This Joyo Infinite Sustainer is Joyo's take on the E-bow which allows your guitar to played like a violin or cello. What is different about is the addition of an additional mode on the unit for overtones. This is great for getting the harmonics to ring out and feedback. Add some reverb, overdrive, and delay and well life suddenly getse more beautiful.