It took me an hour (yes, an hour) to install this because the instructions were so poor! It doesn't say how to put the battery in the sensor - for those who need to buy and know. You need to remove the top of the sensor, then unscrew the small circle and then insert the battery. I don't know about the accuracy yet as I haven't gotten very far yet, but so far it seems accurate. I will update this later. But please note that there are NO instructions!
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