Product Details Ⅰ. Customisable Watering Control: Watering duration adjustable from 1 second to 99 minutes, frequency from 1 hour to 15 days for precise plant care Ⅱ. 3 Independent Irrigation Programs: Store different schedules with unique frequencies and times to meet diverse plant needs Ⅲ. Automatic Rain Sensor: Delays watering when rain is detected, preventing overwatering and saving water Ⅳ. Manual Watering & Child Safety: Instant manual irrigation without disrupting set schedules; child lock prevents accidental setting changes Specification Ⅰ. Watering Duration Range: 1 second - 99 minutes Ⅱ. Watering Frequency Range: 1 hour - 15 days Ⅲ. Irrigation Programs: 3 independent systems Ⅳ. Power Supply: 2 x 1.5V alkaline batteries (lithium batteries prohibited) Package List Ⅰ. Smart watering computer x 1 Warm Tips Ⅰ. Use only 1.5V alkaline batteries; lithium batteries may cause damage Ⅱ. Keep rain sensor chip clean for accurate water detection Ⅲ. Activate child lock after programming to prevent unintended changes