About this article 3 Separate Watering Schedules: You can use our automatic watering timer to set three different watering schedules according to your plants different properties. The watering duration can vary from 1s to 99 min and the frequency of watering can range from 1 hour to 15 days. 2 batteries we sent can be used for 6 months to one year. Rain sensor: A rain sensor chip is installed on the top of the sprinkler timer. When it rains, the watering program will be automatically closed. After the water on the sensor chip naturally evaporates or is dried, the timer setting program will be automatically restored. The function can be enabled or disabled. Multiple Mode: Automatic watering timer has child safety mode, prevent children and pets from triggering the watering schedule to avoid damaging plants and wasting water resources. Choose manual mode to water temporarily when the temperature is high. Waterproof: The drip irrigation can be used outdoors, because the exterior of our garden irrigation is made of ABSPC plastic waterproof material, the suitable water pressure is 0.05 to 0.8 Mpa. And it applies 1/2 and 3/4 water tap connections.