Resolution 0.001mm/0.00005" (resolution of 3101-275A and 3101-300A is 0.001mm/0.0001"). IP54 dust/waterproof. Button function: on/off, set, mm/inch, ABS/INC, data output. Data output. LR44 battery, automatic power off. Carbide measuring faces. Supplied with spherical anvil. Setting standards are included (except 0-25mm/0-1"). Optional accessory: data output cable(code 7306-30, 7302-SPC2A, 7305-SPC3).