Options: Choose from two options. Features: This ultrasonic cleaning machine uses 36,000Hz sound waves to effectively remove plaque stains on your dental accessories. LED Light: Features an LED light which flashes blue when on and red when off to let you know when the machine has completed cleaning. Low-Noise: Features a low-noise and has a one button touch operation to automatically clean your retainer or dentures in just five minutes. Cleaning Machine: Get an ultrasonic cleaning machine to remove plaque from dentures, retainers, mouth guards and more! Portable: Thanks to its compact size, this device can also be taken on your travels with you.