I have always been interested in the various toothbrushes and toothpastes arriving on the Estonian market. Presumably, each new product line is an improvement on the last—though one might wonder just how far toothbrush development can actually go... The ION-Sei Day White toothbrush I got to try immediately captivated me with its intelligent and quiet operation. Having spent a long time trying to get used to the "rumbling" sound of ultrasonic brushes inside my head, using this toothbrush was a pure pleasure from the very first moment. This completely innovative technology utilizes negative electrons to work in harmony with nature, inhibiting bacterial growth. At the same time, the soft bristles noticeably clean the gum pockets. It seems that, for the first time, the body's own natural electric charge is incorporated into the process via a conductor in the handle. The clean feeling in the mouth lasts all day. A pleasant and effective experience! Thank you!