The CDL control base is a computer that is necessary with every system. Only one control base can be used for a customer that has several sugarbush in different locations. Not included : USB Keyboard, USB Mouse, HDMI Screen and cable. For remote site installation (Maple Grove in another region), we need to open port 3125 and a static internet address. Checked with your internet provider for these requirements. ***This item is replaced by a different part number for 2017***