The EzyScan Dual is a hand-held infra-red thermometer, that can measure surface temperature without coming into contact with that it is measuring. To scan, keep the button pressed to scan temperatures. Lift the finger and EzyScan Dual will hold the last measurement for 15 seconds. Features Double laser pointer Instant temperature reading Swing-out tapered probe for quick core temperature test Large back-lit display Adjustable emissivity for different surfaces HACCP check feature Temperature Range -55 +250 °C Accuracy (0-65 °C) ±1 °C Resolution 0.2 °C or 1 °F Quick check Aim the thermometer at the target and press the measurement button to display surface temperature. To get an accurate reading the thermometer must be close to the target. When EzyScan is held 8cm from the target, it will read the average temperature over a circle with 1cm diameter. Target must be matte (not shiny or reflecting) and dry. Scan: Keep the button pressed to scan temperatures. Life the finger and EzyScan will hold the last measurement for 15 seconds. You can take a reading without being able to see the display, if you can check it quickly afterwards. In lock mode: scan for maximum 60 minutes continuously.