The iScreen is a mini vibrating screen of 1 foot X 2 foot (30 cm X 60 cm) designed to work with the iCON150. It can also be used for general smal volume pilot plant or small miner scale screening. On the screen, press the green button on the VFD to start vibration. Use the arrows to increase the vibration to it maximum. Test a small amount of sand on the screen. If the wet material seems to bounce down hill, then change the rotation of the motor by swapping any 2 of the 3 wires from the VFD to the screen.