Measuring Range: 300mm (12") / Resolution: 0.01mm (0.0005") / Accuracy: 0.03mm (0.0015") Sealed to IP54 Standard. Protected from water, oil and coolant splashes & dust ingress mm-inch conversion / zero setting at any point / Auto on & off / Remembers Position when turned off (Reference Caliper) Power: 1 x 1.5V LR44 Button Cell (2 x LR44 Cells Supplied) Supplied by Digital Micrometers Ltd with 12 Months Warranty & Support, Weight: 0.6393405598 pounds, Manufacturer: Digital Micrometers Ltd