Features: High-precision infrared sensor,stable and reliable performance. Strong ambient temperagtre adaptaability,still can be used in complex environments measurements. Save the last measurement automaticallyl. Large LCD screen with three-color high -brightness backlight for clear and soft display Two temperatture units are optional,Ceisius and Fahrenheit,automatic sutdown and energy saving. Specifications: Model No:HY-TWQ01 How to measure:Non-contact Measuring distance:3-5cm Measuring range:32-4289.6-108.5 Maximum allowable error:within 35-420.3without35-420.3 Show resolution0.1 Power:DC 3V,2PCSC 1.5v batteries (not included) Backlight:three-clor high-brightness backlight Auto-shutdown:15 seconds after no operation Size:170*100*40mm Pacakge size:18*7.5*4.5cm Pacakge weight:103g Packing list: 1*Infrared Forehead Thermometer