Features:1. Securely, fast, reliable measurement. 2. / temperature unit conversion. Data hold function. 3. Backlight display selection function. Used for measuring high temperature, dangerous and difficult to access objects surface temperature. 4. Auto shutdown for 15 seconds non-use. 5. Low point display function. Widely used in refrigeration and household measuring. Speciation:Measuring range: - 50 ~ 220 or - 58 ~ 423 Temperature measuring accuracy: 2% or 2 Measuring distance ratio: 2:1Distance coefficient ratio: 1:1Display resolution: 0.1 / 0.1 Emissivity: 0.95Response time and response value: 500ms&(8-14)umRepeatability: 1% or Resolution: 0.1 or 0.1 Battery: 2 x 1.5V button batteries(Included)Size: Approx. 8.1 x 1.8cm/3.2 x 0.7in(L x Maximum Dia.)Package list:1 x Infrared Thermometer.