Item Digital Height Gauge Counter Type Electronic Digital Mechanism Roller Bearing Construction Aluminum Steel Display LCD Resolution 0.00005 in/0.0005 mm 0.0001 in/0.001 mm Range 0 in to 24 in/0 to 600 mm Accuracy +/-(2.4+2.1L/600) micron Base Cast Iron Battery (4) AA LR6 Batteries (4) AA Nickel Metal Hydride Rechargeable Batteries Features High Accuracy and High Resolution Absolute Linear Encoder for Position Detection SPC and USB Data Output