The B200 booster enables you to expand the number of e-series fixtures you can control with your Gavita Master Controller EL series, by adding more output ports.
Standard, every controller port can control 50 fixtures. Adding the B200 expands your system with 4 ports controlling 50 fixtures for every booster you add.
So every added booster controls a whopping 200 fixtures! You can even add multiple boosters to expand to 400 or even 600 fixtures per controller output.
For more information go to the B200 Product page