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Non-contact Measurement.Safe for everyone,infrared technology can read information from the forehead without contact, preventing cross infection between multiple people Alarm & Data storage functions.Up to 50 sets of data storage, Under F1 state, press “SET” to enter F2, press “MODE” to -0.1℃, “MEMO” to +0.1℃, you can choose what temperature to be a fever alarm (factory default: 38.1℃) Measurement Range: 89.6-109.22℉(32-42.9℃), suitable for human body temperature measurement.Meaurement accuracy:±0.36℉/±0.2℃. 3 Colors Indicating Backlit. Green light with smile face - Normal, temperature range between 95.9℉-99.1℉/35.5℃-37.3℃;Yellow light with cry face - Slight fever, temperature range between 99.3℉-100.4℉/37.4℃-38.0℃;Red light with cry face - High fever, temperature range between 100.6℉-109.2℉/38.1℃-42.9℃ Automatic shut-down and power display.The measurement is completed within 20s(error range:+2s)can automatically shut down,press measurem