This PLS-100 set includes a SmartSwitch Board, the brains of the system, a programming board-used to set the speed and desired movement of the servo, four servo motors-including all brackets, fixings and template stickers for positioning, four 39" 1m cables with plug-in sockets and an easy-to-follow setup manual. All connections to the SmartSwitch board simply plug together or attach to screw terminal blocks.