Rechargeable Battery Built-in – Built-in 2200mAh lithium battery eliminates the need for replacing batteries or searching for power outlets. This fully autonomous system can be freely moved around your yard or home. Once charged using the included USB to Mini USB cable, it operates for up to 2 months. After that, simply recharge for 5 hours to continue operation for several more months. Easy To Set – This watering system is simple to set up. First, adjust the watering duration from 1 to 90 seconds or from 2 to 3 minutes; then set the watering interval from 12 hours or from 1 to 10 days. Solve daily watering tasks and ensure plant care during travel. The automatic watering device delivers water on schedule every day, promoting healthier and longer-lasting plants while simplifying your routine. Efficient Water-Saving Design – The automatic plant watering system combines precise timing and pump control to deliver the right amount of water from a water bucket or tank to up to 4, 8, or 12 potted plants. Saves up to 70% water compared to traditional spray methods and irrigation drippers, operating efficiently to conserve both time and water.