3540-300 ELECTRONIC DEPTH MICROMETER 300mm/12" • Resolution: 0.001mm/0.00005" • Flat tips (spherical tips are optional) • Base length 101.5mm/4"(63mm/2.5" is optional) • Buttons:on/off, data set, mm/inch, ABS/INC, data output • IP54 protection • SR44 battery, with one spare battery, auto power off • RS232 output, 3540 is supplied with data output cable • With battery cover wrenc• Packed in plastic box or wooden box.