Features:        Built-in battery, solar charging.     Rainproof, low power consumption, more energy efficient standby.     Use a silent motor to work quieter.     Adjustable water output.     Special garden irrigation water pipe, anti-aging is not hard.     Watering time 1-999 seconds, cycle time 1-239 hours.        Specification:        Name: Timing Automatic Watering Device     Battery Voltage: 3.7V     Battery Capacity: 2000mAh     Motor Power: 3W     Input voltage: 4.2V-6V     Interface type: Micro USB     Pump flow: 900ml/min     Waterproof Rating: Rainproof        Package includes:        without solar panel:     Charging cable X1     Drip head X12     Water pipe X10 meters     Ground insertion X 12     Filter head X1     Subject X1     Three links X 12     User Manual X1                        with soalr panel:     Charging cable X 1     Drip head X 12     Water pipe X 10 meters     Ground insertion X 12     Filter head X 1     Subject X 1     Three links X 12     Solar panel X 1     User Manual X 1