HYGIENIC RETRACTABLE NOZZLE.The retractable design of the nozzle is a user-friendly ideal to keep the nozzle clean and offer a worry-free personal cleaning. ADJUSTABLE WATER PRESSURE.Rotate the switch knob to the left to adjust the spraying water pressure in 5 levels for a custom cleaning,non-electric. NOZZLE SELF-CLEANING FUNCTION.Rotate the switch knob to the right to activate the self-cleaning function for the nozzle in 5 levels,non-electric. EASY INSTALLATION.All accessories are included for standard installation,no special tools required and detailed installation instruction included. And built-in two adjustable slide brackets to fit different toilets. ANTI-BACTERIAL ABS CONSTRUCTION.Made from high grade ABS materials,sturdy,our bidet panel is abrasion-resistant,easy to clean,anti-bacterial,rust-resistant and long lasting.