Dab E.SYBOX Mini 3 Electronic Water Pressure SystemE. Sybox by DAB solves the problem of maintaining consistent, constant water pressure in your hydro pump system across several rooms and installations, from a distance or to an elevated area. The E. Sybox is a compact booster pump that's about 30% smaller than traditional pump and controller systems. At 45dB (decibels) it's whisper quiet. E. Sybox only uses the power necessary to provide the pressure and flow needed making it highly energy efficient