Zima Dental Pod | Arctic White | Ultrasonic Retainer Cleaner Machine | Aligner, Nightguard, Mouth Guard, Denture Cleaner | Oral Dental Care FSA HSA ApprovedADVANCED 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. 30 DAYS RISK