The ST6 SensoTimer has a control sensor that measures the soils moisture level, transmitting every 30 mins to the SensoTimer. There is five different moisture levels to chose from. Essential for maintaining your garden, programming the ST6 is simple thanks to an easy to use, removable battery-powered control panel featuring five, easy to use control buttons including a 24hr pause button to suspend watering. You can set up to water twice a day, for a maximum of 90 minutes, and use your water source manually at any time. Size H15.3, W13.7, D15.3cm. Weight 0.81kg. 2 year manufacturer guarantee.