Olympus 35RDC Composite Damage Checker

Features
For use on solid laminate structure aerospace composites
Simple one-button calibration
Thickness range 0.63 mm to 22.8 mm (0.025 in. to 0.900 in.)
Simple Good/Bad/Beyond Cal display readout
Back light matrix display with user help text
AA battery operation
Handheld, weighing only 0.24 Kg (8.5 oz.)
Energy saving Auto Power off feature
Long battery life, 150 hours typical
Battery life indicator