Am a trained dental assistant and had been looking for a good and wireless irrigator. At first I had doubts, but when I used it, I was thrilled. The 2 levels are sufficient in any case in the radiant intensity. The interdental spaces are well cleaned and the gums is sufficiently massaged. Man Gets along well with 2 times water fill out. Battery life is good and keeps for a long time. Also depends on the number of applications. A good device for daily use and mobile irrigator.