High Preure Design Shower head makes water flow generates a preurized flow through the rotating wheel, increasing the speed of the water flow, thereby increasing the water preure.Apply to low water preure. Water Saving Shower head uses micro nozzle technology makes the outlet holes smaller and denser, increasing the speed of the water flow, At the same time Up to 40% water saving than ordinary shower head. ON/OFF Switch Shower head have a ON/OFF Switch. Just pre the switch on the nozzle handle to stop the water flow at any time. Easy to Uses Handheld shower head adopts G1/2 international standard interface, suitable for most hoses and brackets or shower attachment arms, It can be installed by itself without the use of plumbers and tools. Notes: 1.Please allow slight deviation for the measurement. 2.Due to the light and screen difference, the items color may be slightly different from the pictures,thanks for understanding.