The Simco 4003368 Aerostat PC Benchtop Ionizer is small, quiet, and lightweight, yet uncompromising in performance, it provides superior static discharge over a targeted work surface area. It provides protection from the destructive effects of ESD. No calibration is necessary, it's inherent balance circuitry maintains a balance of 0 ±5V. A built-in emitter point cleaner, provides low maintenance. Integrated heater provides user comfort and an adjustable fan speed control produces an air volume from 35 to 70 CFM.