CRS8812 12 Station, Outdoor box CRS8818 18 Station, Outdoor box CRS8824 24 Station, Outdoor box CRS8836 36 Station, Outdoor box CRS8848 48 Station, Outdoor box. The PRO 1248 has eight individual programs and available in 12,18,24,36 or 48 stations. This allows for efficient watering of turf and garden areas on separate watering programs. With dual pump selection and looping function it is ideal for fertigation or filter control. In fact giving you up to 64 start times per day. It is the "big brother" of the PRO 469 and as such has the same one touch button to switch between programs. Negating the need to scroll through other functions to get to these different programs. Having the rain sensor ready (RSR) facility allows the controller to accept a rain sensor signal directly into the software. Individual stations can be programmed to activate or not activate, bypassing the sensor for certain requirements. Also has a sensor delay time of up to 240 hours. This allows making sure enough rainfall has been absorbed in the growing medium before the controller stops the watering process. Permanent memory holds the program during power outages even when the backup battery is flat. Usage of a 9 volt battery keeps the display during these outages. Extremely versatile extra features such as dual pump programming capability, which can be controlled per station or program. Very handy for either dual water access, fertigation or filter control. Looping cycle on the last program is useful when very frequent watering is required. Programmable delay or overlap between stations is used to prevent occurrences such as cavitation or water hammer during station changeover.