Ring Mailbox Sensor Review: With this gadget, the postman needn't ring at all

Winter is coming, and that means your trip to the mailbox is about to get a bit nasty. And the only thing worse than trudging to the mailbox in the rain or snow is having to do it twice because the mail carrier is later than usual that day. Two years ago I reviewed Smart Alert for Mail (SAM), a simple device designed to sound an audible alert in your house when the mailbox is opened. Now smart home giant Ring is getting in on the game, with a more sophisticated device that integrates with the Ri...