Fangrui Product Details Features: The New Intelligent Watering System Automatically Waters The Plants Regularly; Can Be Powered By Usb Cable, Or Can Use 4 Aa Batteries (not Included In The Product), The Battery Be Used As Backup Power After The Device Is Connected To Usb; Drip Irrigation Head Design, High Efficiency, No Damage To Plants, Saving; Intelligent Memory Chip, No Need To Reset Watering Parameters After Power Failure Recovery, More Convenient To Use; Complete Accessories, Easy To Assemble And Use, One Set Of Equipment Can Water 10 Pots Of Plants And Flowers; Small And Light, Does Not Take Up Space, It Is Very Suitable For Use In Homes, Offices, Terraces, Balconies, Laboratories, Etc. Specifications: Rated Voltage: 5v External Dimensions: 83 X 83 X 95mm Rated Current: 720ma Power:3.6w(single Pump) Interface Diameter: 4.8mm Diameter Matching Piping: 4/6, 4/7 Max. Water Pressure: 0psi Flow Rate: 0.3-0.8lpm Battery Type: 4-aa 1.5v(not Included) Noise: 5db(30cm Distance) Operating Temperature: 0-50c Head: .5m Pum