Resolution: .00005"/0.001mm. Micrometer head accuracy: ±.00012". Rod accuracy: ±[.001+.0005(L/3)]", L is the measuring range in inch. Button function: on/off, set, inch/mm, ABS/INC.IP65 dust/waterproof. Data output. LR44 battery, automatic power off. Rods with flat end. Ratchet stop.