ExcaVision 7 is the latest model of depth monitor from Excavision. It has three wireless extended range(XR)sensors that mount on the bucket, stick and boom. In the cab is a receiver box that picks up the signal from the sensors and the laser receiver if used. The receiver box updates the touchscreen display. This display shows the location of the bucket and on-grade line. If you have your own laser receiver that can be used with the basic ExcaVision 7 package. Used for digging tile mainlines and start holes and for digging footings and basements. Can be used with or without a laser. I have a demo/display unit in stock that is available. For a new unit add $1250. ExcaVision 7 demo unit, $6500 ExcaVision 7 demo unit with LR50 laser receiver and OcaLink, $9000. Trimble GL412N single grade laser package, $2100.