Product description:Size: approximately 40mm*148mm*50mmPower supply: 1 x 3V CR2032 (included)Turns off automatically after being inactive for 30 secondsFunctions: ambient temperature from the ear， forehead， temperature temperature， clockRange of measurement: 0° C - 50 ° CAmbient temperature range: 5 ° C - 40 ° C (relative humidity: 80% or less)Storage temperature: - 20 ° C to 50 ° C (relative humidity: 95% or less)Three-color backlight (switchable)Package includes:1 x infrared thermometer1 x manual in English