Spot Clean Item: The power of ultrasonic waves makes troublesome stains clean and clean: The ultrasonic vibrations of about 38,000 times per second generate vacuum bubbles in the water and repel dirt with the powerful power that generates when bubbles are shedding. Easy to use, simply dip the clothes you want to clean with water, apply the ultrasonic washer and rinse with clean water. Easily and quickly remove stains from shirt collars and blouses or accidental food spills.