Technical Data:
Digital inside knife-edge calipers
Measure diameter of deep step holes
Non waterproof
Resolution: 0.01mm/0.0005in
Automatic power off, move the digital unit to turn on power
Battery: CR2032
Made of stainless steel
Buttons: on/off, zero, mm/inch
Range: 15-150mm/0.6-6in
Accuracy: +/-0.05mm

Dimensions:
L=250mm
a=60mm
b=12mm
c=16mm
d=0.3mm
e=3.5mm

Remark:
Built-in wireless; receiver code 7315-2/3/6/7/8/9 is needed