Features: Exquisited, lightweight, and easy to carry, with a simple and streamlined appearance, stylish and beautiful, this temperature recorder is specially designing and developed for temperature monitoring in cold chain logistics. USB temperature and humidity recorder, insert and play, can be directly connection to mobile phones and computers, automatically generates PDF or PDF & CSV files, can be viewed at any time, convenient and fast. Equipped with LED indicating light and alarm function, when the temperature exceeds the set alarm value or the voltages is under 2.5V, the redness indicating light will light up and be in alarm state. Power by CR2032 battery, with low power consumption and long battery service life, it can work continuously for up to 180 day in working condition, with 8640 recorded points! For one-time use, when 8640 data records are reached, it can be turned on normally, but no more data will be recorded. Widely used in cold chain transportation, food cold storage, laboratories and more. Specifications: Material: Plastic Type: PDF21WC1, PDF21WC2, PDF21Wi1, PDF21Wi2(optional) Size: about 85.5x38x9mm/3.36x1.49x0.35inch Usage: one-time use Temperature accuracy: ± 1.0℃ (0℃~40℃), ± 2℃ (other ranges) Temperature detection: -30℃ ~ +70℃ Record interval: Two data intervals (ranging 1-99 minutes) File format: PDF/PDF+CSV Power supply method: CR2032 battery power supply Record count: 8640 points Package Includes: 1Pc Temperature Data Logger note: Please allow 1-2cm errors due to manual measurement. Please allow for slight color differences due to different display resolution.