Item Digital Height Gauge Counter Type Electronic Mechanism Optical Scale Construction Aluminum Steel Display LCD Resolution 0.00001 in/0.0001 mm 0.0001 in/0.001 mm 0.001 in/0.01 mm Range 0 to 400 mm/170 to 570 mm Accuracy +/-(2.5+4 x L/1000) micron Features Air Cushion System Rechargeable Battery Includes Battery Pack SCS Certificate