All to frequently, the thermo-hygro unit stops communicating with the base station. A "factory reset" is required to restore communication but this results in loss of stored minimum and maximum values. Any rainfall totals are erased as well. Also, the rain gage has failed to record rainfall on occasion. I recently repositioned the thermo-hygro unit two feet along a beam that it was mounted to without disconnecting the battery or cables and it lost communication with the base station. ???I would not recommend this unit.