Technical Data:
Digital tube thickness calipers
Non waterproof
Measure wall thickness of tubes
Resolution: 0.01mm/0.0005in
Buttons: on/off, zero, mm/inch
Automatic power off, move the digital unit to turn on power
Battery: CR2032
Made of stainless steel
Range: 0-150mm/0-6in
Accuracy: +/-0.05mm

Dimensions:
Overall length=234mm
Contact point dia.=3mm
Measurable tube inside diameter d>3mm
Drawing dimensions (unlabeled)=40mm; 32mm; 16mm

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