20 years NDT experience,ISO, CE & RoHS certificated, this is how we keep superior quality and competitive offers for global valued customers Display Type:2.4'' color OLED, 320�240 pixels, contrast 10,000:1 Operating Principle:Pulse echo with dual elements transducers Measuring Range: 0.02'' to 20.00'' (depends on material, probe and surface condition) Measuring Resolution:selectable 0.001'', 0.01'' Units:Inch or Millimeter Rectify Mode:RF+, RF-, HALF+, HALF-, FULL Display Mode:Normal, Minimum/Maximum capture, DIFF/RR%, A-Scan, B-Scan V-Path Correction:Automatic Update Rate: 4Hz, 8Hz or 16Hz Material Velocity Range:0.0197 to 0.3939 in/μs Languages:Chinese, English, Japanese,French, German Alarm Settings:Minimum and Maximum alarms. Range of 0.010'' to 20.00''. Dynamic waveform color change on alarm Operating Time:Approximately 40 hours with two AA batteries Instrument Shut-off: ALWAYS ON or AUTO OFF after 5, 10, 20 minutes of inactivity Operating Temperature: 14°F to 122°F Application Software: UmView Software for transmission,storage,analysis and documents editing Size: 6'' x 3'' x 1.5''