No Buzz! Pure sine wave energy from the Exeltech XP Series inverter. The XP Series inverter is an excellent inverter that will operate any AC load. Light in weight yet extremely rugged, it is great for mobile applications or for a home. Some people buy a larger modified sine wave inverter for their house and a small Exeltech for the loads that require pure power. No buzzing is heard when you power electronic equipment using your Exeltech XP Series pure sine wave inverter.