YUSHI INSTRUMENTSWe Are Manufacturer 20 years NDT experience,ISO, CE & RoHS certificated, this is how we keep superior quality and competitive offers for global valued customers This instrument can be widely used in the fields such as manufacturing, metal processing, chemistry and business inspecting for measuring the thickness of all sorts of materials where ultrasonic wave can spread through with a constant speed and get the reflection from the back side Probes/Transducers Option: PT-08/04/06/12GT-12ZT-12TC110/210/705 Display Type:2.4'' color OLED, 320�240 pixels, contrast 10,000:1 Operating Principle:Pulse echo with dual elemet transducers Measuring Range:0.025 to 20.00 (depends on material, probe and surface condition) Measuring Resolution:0.001 or 0.01 Units:Inch or Millimeter Gain:Low, Medium or High for varying test conditions Display Mode:Normal, Minimum/Maximum capture, DIFF/RR% V-Path Correction:Automatic Refresh Rate: 4Hz, 8Hz or 16Hz Material Velocity Range:0.0197 to 0.3939 in/μs Languages:English, Chinese, Japanese, French etc 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 Size:6 � 3 � 1.5 (H � W � D) Weight:280g including batteries Battery and Couplant are Prohibited Goods by Air Shipping by DHL taking 3-5 days Whats in the BOX? 1*Main Unit, 1*Probe, 1 * Carrying Case, 1* User Manual