This is a brand new, unopened electronic thermometer. It's a real-time thermometer and takes approximately 3 minutes to measure. It has a buzzer and memory function. The auto power-off function prevents you from forgetting to turn it off. The button battery is replaceable, allowing for repeated use. It can be used in both the armpit and mouth. 【Ministry of Health, Labour and Welfare】Certified and Approved 【Measurement Method】Real-time 【Measurement Time】Approximately 3 minutes or more 【Functions】Buzzer, memory function, auto power-off, replaceable battery 【Measurement Sites】Armpit, mouth Thank you.