Height: 1.57"/40mm, Dia. 0.78"/20mm. Height accuracy . Repeatability, ยฑ 0.000039"/0.001mm. IP67 protection. Carbide touch surface (0.196"/5mm). High precision bearing guide system for long life. Interchangeable magnetic base. High visibility LED indicator. Movement stroke 0.078"/2mm. Trigger force: 54-188-140-0, 1.0N (3.6 oz./100g). Operation temperature +5 DegreeC to 50 DegreeC (40 DegreeF to 120 DegreeF). Uses 2, 1.5V batteries (SR44 or LR44). Battery life approximately 250 hours (on time).