X-Sense Smart Mailbox Alarm, Wireless Long Range Mailbox Alert, Mailbox Sensor with SBS50 Base Station for Delivered Mail, SMA11

This works exceptionally well for my mailbox. The alarm would trip from anywhere I tried in my home with the mailbox about 50 feet away. I opted to mount the sensor with a couple of 4-40 screws instead of the double backed tape for better longevity. Drilling and tapping the existing holes worked well. The only issue I had was during the pairing of the mailbox sensor in the app. My mailbox type is the second choice within the setup options. Selecting that displayed the first option mailbox. It appears that the two options are swapped, at least in my copy of the app. Once I selected the "wrong" mailbox option, the setup went smoothly. I like the many option in the app. It has multiple alarm tones, including my wife's favorite, a barking dog. It also records the time and date of mail delivery and alerts me with a tone on my phone. This is the main reason I purchased this. I receive perishable medication in the mail that cannot get too warm or freeze. Now I will know instantly when to retrieve my mail.