ADVANCED ULTRASONIC TECHNOLOGY: This sonic cleaner uses high-frequency 42,000 Hz ultrasonic waves to scrub away stains and plaque while being non-abrasive to your dental appliance. QUICK AND EASY TO USE: Fill the Dental Pod with water, drop in your dental appliance, then activate. Wait for 5 minutes, then retrieve your clear and sparkling clean dental appliance. For tougher stains, add a Zima Dental tablet for enhanced cleaning power. Free tablets.