The Humming bird infrared thermometer measures the fever, the primary characteristic of virus infection such as Corona, Monkey pox..ect, and enables to detect a virus infection from the first step. With the combination of the time-proven MEMS state-of-the art sensing element with a fully integrated A/D converter and world-patented ISO thermal Cap sensor, Hummingbird always delivers an accurate and dependable temperature data regadless of ambient temperature. Key Features Instant Measurement Within 0.1 SEC Accurate And Dependable Measuring Result Bright And Clear Luminance Of Lcd, Makes Better Readability Even In Outdoor Device Specifications Precision Range : ±0.2C Measuring Distance : 2cm ~ 5cm Auto Power Off : 10s ± 1s Measuring Process : LED Lamp + Buzzer Battery: Changeable for two 3V triple A batteries Operation Temperature : 20C ~ 40C Storage Temperature : -10C ~ 60C Dimension : 40(W)mm x 70.8(D)mm x 153(H)mm