Specifications: Material: ABS Batteries: 2 x 1.5V AAA batteries (not included) Proper water pressure : 0-8kg Package includes: 1 x Irrigation timer 1 x Instruction manual use in English How to use: Insert the battery. The first time the battery is installed, the water valve will check once, and the valve ball will close automatically. Set rotation switch B to cycle time desired. Set rotation switch A to the time needed for continuous watering. The water valve operates automatically within 10 seconds. Note: The valve adjustment time cannot be less than the duration of the open valve output. When the rotary switch B is set to 0 state, the water valve only opens once for watering. When the rotary switch A is set to OFF, the water valve turns off .