Top critical review
Very good to predict a weather change, but not altitude
on January 2, 2012
The altitude readings vary very much and change with the air pressure.
I keep it stationary in my house. Unlike weather talking heads, this device is always correct to predict the weather change.
When I see that my house is up in the mountains or below the see level, I always know which way the weather is changing.
For the amount of money paid, I would not wish anything better.