Check the listing for details. Gavita Master Controller EL2 - Gen 2 (Latest Version). Condition: New. Listed at 288.27 USD. Gavita Master Controller EL2 - Gen 2Lighting control at your fingertips! The Master controller EL1 and EL2 Gen 2 are our entry-level systems for centrally controlling large rooms with e-series fixtures. The second generation of Master controllers features improved and expanded functionality that raises the bar including non-volatile memory, event logging, independent sunrise and sunset settings and independent light cycles on the EL2. The EL1 has one lighting control channel and the EL2 has two lighting control channels. The EL1 can control 500 max repeater bus fixtures and 40 max single bus fixtures without a booster. The EL2 can control 1000 max repeater bus fixtures and 80 max single bus fixtures without a booster.If using the EL1 or EL2 controller with a Gavita or Sun System LED fixture (1700e/900e/CT1930/RS1850) you will want to purchase either HGC906717 or HGC906716.