Mengshen Temperature & Humidity & Air Pressure Meter, USB Data Logger with LCD Digital Display, Built-in Alarm, MS-M163 Quick & Easy Monitoring - Digitally Measures and Saves Temperature, Humidity & Barometric Pressure Readings Instantly Save, Recall & Review Data via PC Computer (USB Port Connector) - Temperature Range: -40 to 221F Programmable Recording Time Intervals - Alarm Function - Temperature Setting LED Light Alarm Indication Save & Record up to 12,700 Thermometer/Hygrometer/Barometer Data Entries - Battery Operated (3.6V Included) LCD Display - Temperature Accuracy: +/-2%, Humidity Range: 0% - 100% RH, Barometric Pressure Range: 10-1200 mbar