Product review (2 stars): ID issues
Got two units, one for measuring outdoor temperature-humidity, the other for monitoring the same in the attic. When second units was turned on, it ignored the outdoor sensor it came with and locked to the existing sensor that belongs to the first unit. Instructions say that in case of interference one can set the ID on the meter and the sensor, and that the instructions are on the next page. Well, they are not, and also the unit has no dip-switch or anything obvious for setting or changing the ID. I reset the unit I had before, and it immediately locked to the new sensor, instead to the sensor it was locked to previously. So apparently units "stole" each other sensors. Weird. I solved the problem by swapping the terminals, one intended for measuring T/H outdoor I use for attic and vice verse for the other sensor. Looks like once locked, the unit holds connection to the outdoor sensor, hopefully it will stay like that, cause I'd hate to have to climb the attic to remove the sensor and send it back to manufacturer.