Failure of sensor or communication circuitry causing displayed temp and humidity to flash, requiring constant reset following any profound changes in humidity or temperature (which is everywhere now). Unacceptable performance of this company product. New batteries in transmitter and receiver modules. Connections, switches and circuits clean, and intact. No exposure to transmitter to rain or other direct weather conditions. As a Consumer Advocate who posts global products for consumer information, this product fails performance standards. Do not recommend purchase of these products.