This mutifunctional thermometer is a useful and accurate tool to check and track healthy conditon and temperature change, suitable to use in many public occasions, like company, factory, school, mall, station etc. Features: °C/°F Switch: Short press Button M. Body/Object Mode Switch: Long press the power key for 2.5s.（If no operation in 10s under object temperature mode, it will automatically change into body temperature mode） F1 Alarm Temperature Value Setting: Long press the mode button once to enter into F1, then short press +/- button to adjust the alarm temperature value. F2 Temperature Compensation Setting: Long press the mode button twice to enter into F2, then press +/- button to adjust the temperature compensation value. F3 Language Choice: Long press the mode button three times to enter into F3, then press +/- button to choose language（English/Japanese/Portuguese/Korean/Spainish/German/French/Arabic/Russian/Italian/Chinese）. F4 Voice Setting: Long press the mode button four times to enter into F4, then press +/- button to change between voice on and off. BT on/off Switch: Long press the - button for 3s to set. Specifications: Screen: Digital Diaplay Accuracy: +-0.2 Degree Response Time: 0.5s Abnormal Automatic Alarm: Voice Measuring Distance: 5cm - 10cm Power Supply: 3 PCS of AA Battery or DC5V 1A or DC12V 0.5A Environment Temerature:10°C-42°C Standby: About One Month Installation: Hook Up / Double-sided Tape / Bracket Fixing Package Weight: 165g / 5.8oz Package Size: 130*95*45mm / 4.6*3.4*1.6in Packing List: 1 * Thermometer 1 * USB Cable 1 * Screw Set 1 * Tape