Rainbird ESP-Me Modular Indoor Mount Controller, 120V 4 station base capability, expandable up to 22 stations using hot-swappable 3- or 6-station expansion modules (sold separately) 4 individual programs with 6 independent start times per program Large LCD display with easy to navigate user interface and dial - Rain Sensor input with override capability Non-volatile (100 year) storage memory saves current programming, no battery required One touch manual watering - Delay watering up to 14 days