Vesternet Zigbee Motor Controller2 Inputs For Connecting Switches Positioning Calibration Instead of holding up or down, Positioning Calibration allows you to use 0% 100% levels to position the blind more easily & accurately. No Hub Required Can operate standalone if needed, for example being directly paired to a remote control or wall controller. This means for simple installations you don't even need a hub, but can optionally add a hub at a later date to expand the functionality