Bidet4me, MB-1100, Fresh Water Spray Non-Electric Mechanical Bidet Toilet Seat Attachment - Self Clean Function Adjustable water pressure (high, middle, and low) base on your preference You do not need electricity from ac or battery required Very easy and quick self installation (most people take 10 20 minutes) Retail package includes all DIY accessories (no additional tool required) Build in good quality and super great value for money you spend