Of course you can power on/off by holding down the single pressure sensitive center of each earbud. It lets you do 1 area, or all areas, but I sometimes want to manually water 2-4 areas and the app wont make that easy. Came as advertised. I know there is Ultra Fast Charging. So, I would compare these to a 8 or 9 womans size. This is the second time I ordered this product. Tutti i dentisti sono ormai concordi sull?efficacia dello spazzolino elettrico contro la placca, tartaro e in generale in termini di migliore e più efficace pulizia dei denti. My kiddo loves his Tevas! All you had to do was fold down the shelves and lock them in place. They essentially are open back, so might be an issue in some environments.