FLUS USB Humidity and Temperature Data Logger Recorder with LCD Screen High-Accuracy Thermometer Hygrometer Temperature Humidity Guage This is a very practical temperature & humidity data logger. It is used for monitoring and collecting data of environment temperature and ambient humidity, and the recorded data can be viewed in the PC in PDF file format, convenient for you to analyze. It can be widely used in indoor temperature measuring, warehouse management, logistics transportation, telecommunication rooms, intelligent buildings, subways, department stores, libraries, etc. Features: Wide measuring range, and high accuracy for temperature and humidity. Digital LCD display for convenient reading the temperature and humidity data. Large memory capacity, it can test and record up to 25000 temperature and 25000 humidity data. The USB interface can access to the PC's USB port for data transfer, and you can view and analyze the recorded data in the PC in PDF file format. With security keyhole for keeping the meter and data safety. Supports setting high/low temperature and high/low temperature alarm value. Supports setting sample period(selectable from 1 second to 24 hours) and converting temperature unit(℃ or ℉). Small in size, portable to carry, easy to operate and use. Specifications: Material: ABS Humidity Range: 0~100%RH Humidity Accuracy: 45~75%RH: ±3.0%RH Other Ranges: ±5%RH Temperature Range: -40℃~70℃/-40℉~158℉ Temperature Accuracy:  -10℃~50℃(14℉~122℉): ±1.0℃/1.8℉ Other Ranges: ±2.0℃/3.2℉ Resolution: 0.1 LCD Frequency: 1 time/second Memory: 25000 Groups Over Range Indication: LCD Display "-OL-" Symbol Power Supply: 1 * CR2032 3.0V Button Battery((NOT Included)) Operating Temperature: -20℃~60℃/-40℉~158℉ Operating Humidity: 10%RH~90%RH Storage Temperature: -20℃~60℃/-40℉~158℉ Storage Humidity: 10%RH~75%RH Item Weight: 36g / 1.27oz Item Size: Approx. 97 * 44 * 13mm / 3.82 * 1.73 * 0.51in Package Weight: 70g / 2.47oz Package Size: 135 * 85 * 30mm / 5.31 * 3.35 * 1.18in Package List: 1 * Data Logger 2 * Adhesive Stickers 1 * User Manual(English)