The AD801 is a non-contact infrared forehead thermometer designed to measure human body temperature. Weighing only 104g, it can measure temperature accurately from a distance of 3cm to 5cm. The device has an accuracy range of 35°C to 42°C with a precision of ±0.2°C (or 95°F to 107.6°F with a precision of ±0.4°F) and a quick measuring time of 5 seconds. Additionally, the AD801 features an auto power-off function that turns off the device after 30 seconds of inactivity.