Product review (1 stars): This set worked well for a year with regular battery ...
This set worked well for a year with regular battery changes.  The base unit continue to report inside temp and humidity.  I have replaced the outdoor monitor.  Neither the old nor the new monitor does not transmit to the base with Duracell alkaline batteries.  I went out and bought very expensive 5 year lithium batteries.  Its not the batteries.  Returning the new outdoor sensor and recycling the indoor monitor.