In 2015, David and Serena established a factory to manufacture their own ultrasonic cleaner.
In September 2016, their first ultrasonic cleaner, named "Smartclean," was born. The name represents intelligence, safety, ease of cleaning, portable, and elegant. It was a birthday gift for Landy and was the first mini home-use ultrasonic cleaner in the world.
In October 2016, the Smartclean Ultrasonic Cleaner was debuted at the IOFT trade show in Japan.
Since then, the Smartclean ultrasonic cleaner has been displayed at international exhibitions and in various shops.