Product is made in Taiwan, but instructions in Korean. Fortunately can read the Chinese version in the box. Cleans using sonic vibration. Works well! Expensive though, considering material is normal plastic.
Received with thanks. Have not use yet.
Received a pink one which looks great. Good that it also provides a contact lens case that can be used in the washing equipment and a few glasses cleaning cloth. Cleaned my glasses and can see dirt in the water after cleaning for 5 minutes.
[SAEJINART] Cordless UltraSonic Cleaning Technology Jewelry Cleaner