Temperature data logger, single use (discontinued use); Can be used for up to 13 days; Alarm / Below 4°F (2°C), above 8°C (continuous alarm notifications for more than 30 minutes); Measurement range: -30°C to 60°C; Sampling intervals; 1 minute; Log intervals; Data acquisition method / Using smartphone NFC function. Product Size: 1.6 x 2.1 x 0.2 inches (40 x 54 x 5.5 mm); Weight: 0.2 oz (6 g); Battery / Lithium coin battery; CR1620; Product life: 13 days; Single use; Non-use; Waterproof standard; IP54; Sensor; NTC Thermistor; Alarm type; Irreversible Microdata logger TL520 Records temperature information inside Single use temperature logger. After the main unit is activated, simply attach it to the object that is temperature controlled, and it will start professional data logging. When threshold exceed (below 6.6°F (2°C) and 8°F continuously for over 30 minutes), the LED will light up and remind you of the threshold level is exceeded. -Can be used in temperatures ranging from -30°C to 60°C, so you can get the highest temperature, lowest temperature, temperature and temperature history graphs and CSV data during transit in PDF and Exel. Monitoring information can be easily viewed by simply holding your smartphone using the NFC function (near-field wireless communication) and the dedicated app (free of charge). It is a great tool if you want to save costs and gain temperature history.