Review on Wireless Mailbox Alert - Mailbox Alarm, Briidea with 500ft Range, LED Light Flashing, and Sound Reminders by Shane Mack

There are 2 of these letterbells on Amazon which are very similar except for the price, the other is $20 more I would recommend you check out the " other" to buy. ".three reasons1. The light on the recipient's mailbox is always on and only flashes when the mail is being delivered. 2. This may work well when the sensor is only a few feet away, but in the real world my mailbox is 50 feet from home and won't see the sensor even if the receiver is inside an outside wall. I had "another" that worked great for the last 15 years but eventually failed and I bought a similar one but at a lower price. Not so hot! Now I will buy "other".