Technical Data:
Digital deep hole inside groove calipers
Non waterproof
Measure diameter of grooves inside deep holes
Resolution: 0.01mm/0.0005in
Buttons: on/off, set, mm/inch, preset (+, -)
Automatic power off, move the digital unit to turn on power
Battery: CR2032
Made of stainless steel
Optional accessory: depth stop 6143
Range of upper jaw: 0-300mm/0-12in
Range of lower jaw: 30-300mm/1.2-12in
Accuracy: +/-0.06mm

Dimensions:
Overall length=410mm
Drawing dimensions (unlabeled)=38mm; 77mm; 17mm; 70mm; 7.5mm; 3mm; 15mm; 4mm

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