Why waste time and energy running back and forth to the mailbox to see if your mail has arrived? Let Mail Chime’s wireless mail alert system do it for you. This wireless solution couldn’t be any easier to install or use, and it makes life more convenient. When the mailbox door is opened, a sensor sends a signal to the mail chime in your home. A bright red LED light will turn on and four audible beeps will announce your mail’s arrival. It works from up to 300 feet away and a long-lasting 12-volt battery is included.