Description: The Mini Digital Hygrometer is great for spot checking conditions in your growing area, and can also be thrown into curing jars to monitor their humidity and temperature! This handy little unit takes the guesswork out your operations without breaking the bank and can also be built into propagators and incubators if need be. With its compact size of 48 x 28.6 x 15.2 mm this unit will fit almost anywhere. Specifications: Temperature range: -50 – 70 °C Accuracy: +/-1 °C Humidity range: 10% – 99% Accuracy: +/- 5% Batteries: 2 x LR44 / AG13 button cells ( INCLUDED )