This product works well enough, but the battery life is terrible. The 3 AA batteries need to be changed every 2 or 3 weeks. You notice a drastic decrease in pressure when they start to lose their juice. If I had to purchase again, I would buy a different model that plugs in.
I ordered this battery powered device and very happy with its ease of use and portabilty. My teeth feel clean and fresh after its use. Highly recommend