The Holman Low Pressure Tap Timer is designed to be fitted to gravity feed systems, or a low pressure rain tank. The tap timer will automate these water sources and control the water flow to the connected hose or watering system. Programming is as easy as selecting the watering run time (up to 240 minutes) and the watering interval (from every 6 hours to every 7th day). This tap timer is easy to install and is battery operated (9V).. KEY FEATURES: Simple 3 step programming Automatic and manual operations Battery life indicator (flashing LED) Long run time for watering systems with low pressure Rated to 600kpa for reliable operation PRODUCT SPECS: Brand: Holman Model Number: CO1603 Material: Plastic Colour: Black Weight: 0.340kg Corded: No Cordless: Yes Wireless: Yes Wired: No Battery Back-Up: Yes Computer Software Compatible: No Digital Display: No Expandable: No Manual Bypass: Yes Maximum Cycle Time (min): 120 Odd/Even Day Program: No Power Source: 2xAAA Programmable: No