This precision digital caliper has a scale on one side and a non-removable slider with a digital display. The caliper is 74.5 cm or 29.3" long. The scale reads to 600mm or 24 in.. The maximum reading of the digital display is 643.0mm / 25.31 in. The slider can be locked at any position. The flat blade base that goes under the patient is 1/8 in thick and 11 in long.

Slider Functions: 
ON / OFF, ABS / INC, ZERO, mm/in, SET, and HOLD.
RS232 output for connection via cable to computer.
Includes a replacement battery.