The SPR-146 is a compact, USB-powered temperature and humidity data logger designed for continuous monitoring in environments ranging from -30°C to 60°C (-22°F to 140°F). With 20,010 data points storage and customizable sample rates (1min–24h), it is ideal for HVAC, cold chain logistics, laboratories, and industrial storage. Features include alarm indicators, auto-PDF reporting, and CR2450 battery operation.