Intelligent Rain Auto Sensor VersionThe Built in rain sensor chip will automatically sense the rainwater and monitor the real time rainfall with high sensitivity , then responds to pause your programmed watering schedule by interrupting to the valve, which could help to save water and prevent over watering on rainy days. As the rain sensor gradually dry out, the irrigation timer will run again as scheduled, omit to manually turn off the timer in rain! Waterproof Durable ConstructionIP55 grade waterproof, this garden hose uses new pneumatic sealed components and the top connector is made of high durable solid material, which makes the water timer much more impact resistant and wear resistant than ordinary plastic. The inner valve could withstand up to 10kg water pressure to greatly avoid internal leaking, and the waterproof battery case cover with an internal rubber ring around could protect the batteries away from water and dust. Low Power Consumption 2*1.5V AA Alkaline batteries must be used(Not Included) which allows the water timer to work over 6 months. If the garden hose timer not operated within 30 seconds then the screen will enter into sleep state automatically to save battery power, also will shut itself off when the powerful chip detects low power supply before battery dead, especially the battery indicator can display the remaining power to remind you changing the battery in time.