Safety and Environmental friendly: When the battery power is low, the device automatically stop watering to protect itself. If you have battery operation, and set it watering 1 minute everyday, it can keep working last about 5 months. At the same time, compared with traditional and plant irrigation drippers, it can save 70% of water. So there is no need to worry about safety and waste of water and electricity. Multi-advantage:This product is equipped with minature diaphragm pump,with high efficiency,low noise,small vibration,high suction,high head, and many other advantage.4xAA batteries and adapter dual-mode uninterrupted power supply,safe and reliable,let you easily,carefree. : There is no fixed faucet restriction, you can water wherever you want.The lift of the suction pump is 2.5 meters, no need to worry. At the same time,our automatic watering device not only supports USB,battery also could be choosen., Weight: 1.76259578469 pounds, Manufacturer: Bosiyrggrl