Handheld logger with a real-time clock and an LCD screen that shows live temperature and humidity readings on the spot rather than requiring a computer. It logs up to 32,000 data points over a -40 to 158F (-40 to 70C) range and 0-100% RH, flags min/max alarm breaches with an LED, and comes with a wall-mount bracket and lock for fixed installations. This listing is the NIST-certified version of the same instrument, adding a traceable calibration certificate.