MODEL DESCRIPTION (INDOOR/OUTDOOR) INCREASE ZONE COUNT
SL800 4-Zone Base Indoor Model SLM2 – 2-Zone / up to 8 Zones
SL1600 4-Zone Base Model SLM4 – 4-Zone / up to 16 Zones
SL1620 20-Fixed Zone Model N/A
SL1624 24-Fixed Zone Model N/A
SL4800 12-Zone Base Model SLM12 – 12-Zone / up to 48 Zones