【Unique Design of Low Noise】 The top of the Retainer Cleaner Machine is designed with 2 multi-functional reserve holes, which is very convenient to clean long items such as toothbrush head and makeup brush, and can also be used as a vent to maintain good heat dissipation effect. The bottom is equipped with four pieces of non-slip rubber, which is easy to stabilize the ultrasonic cleaning machine, effectively reduce noise and make it safer to use