Have you ever wanted to keep a closer eye on your mailbox and get notified when you have any new activity? The SinMan WiFi MailBox Chime can help. It is a smart sensor that sends you an instant notification when you have mail. It works with your 2.4 GHz WiFi connection and has a range of up to 150 feet.
This mailbox sensor doesn’t need a separate hub to work. It has a compact design, so it should work on almost any type of mailbox. It runs on a CR123A battery.[where to get it]