Water Dental Flosser Water Dental Flosser Water Dental Flosser Dental Ultrasonic Cleaner Dental Ultrasonic Cleaner Retainer Cleaner Tablets I have very sensitive teeth is the pressure too strong? I have very sensitive teeth is the pressure too strong? How often do I need to charge it? I'm worried that it's draining too fast. I've had mine 3 weeks and used it daily. I see the seller suggests charging once every 2 weeks, you can use that as a reference Is it portable? I travel a lot for business or pleasure. For me, it's easy to carry, the tank is smaller for traveling, and the 200ml tank is enough for most people, whereas the 300ml tank of other flossers is too big to carry. I see that there is a Custom mode, how do I use it? The customization mode has a total of 8 gears, so you can easily find the gear that suits you. 1- turn on unit 2- hold mode button until "CH" "Custom" light flashes 3- each short press of mode button will change custom setting pressure. Does the package include the charging adapter? No. But I think it doesn't matter, because everyone has tons of adapters at home to use, It is enough to get a cable, which can be compatible with my mobile phone adapter and computer USB socket, It's convenient for charging.