The water reservoir is easily disassembled to fill water or clean scale incrustation; Also can add water from the door design on the tank.Portable oral lrrigator have rotatable tips that can reach the hardest spot in your mouth. It can remove dental plaque more efficiently and another dental issue. Make the stains in your teeth nowhere to stay! All-round oral cleaning!!Professional Dental Flossers with smart memory Function, you don't need to change the mode on the OLED display when you restart flossing.Grainy design on the back of the portable oral lrrigator makes it easy to use in the shower, prevents the machine from slipping when holding the machine with wet hands in the shower. Avoid electric leakage and enhance safety.