A modified sine wave is a type of electrical waveform commonly used in power inverters. Unlike a pure sine wave, which has a smooth and continuous oscillation, a modified sine wave has a more stepped shape. This makes it simpler and cheaper to produce, but it can create more electrical noise and may not be compatible with all devices. Modified sine waves are often used to power basic appliances and tools, such as lights and fans. However, sensitive electronics, like computers and audio equipment, may not function optimally with this type of waveform, potentially leading to reduced performance or damage.