The CPS Products TS-100-6PK Temp and Humidity Meter is a reliable and versatile tool for monitoring temperature and humidity levels in various environments. With data logging capabilities, users can keep track of changes over time and ensure optimal conditions for their industrial or business needs. This 6 pack bundle offers increased coverage and monitoring capabilities for a range of applications. All 6 are working in the app. Batteries may be low in some of the fobs