Rotation grade laser level GL422N, useful for machine control systems. CALIBRATED!, Laser levellers for Machine Control Systems, Machine control systems for excavators and bulldozers / graders - GeoStar
Spectra Precision GL422N Dual Grade Laser Level, Automatic Self-Leveling with HL760 Receiver, Radio Remote Control, Adapters, Rechargeable Batteries, Charger, Case - - Amazon.com