Vordich Pro Drip Irrigation System 72 Plant + Rechargeable Automated TimerThe drip irrigation automatic watering system allows you to easily control the watering process using water from a barrel (water barrel not included), gravity flow ensures even distribution of water and nutrients to the roots of each plant. Drip irrigation improves plant quality and yield. This kit is easy to install, use and maintain. The zero pressure automated timer has a large LCD display and a rechargeable battery which runs for over 1500 cycles