Check the listing for details. Mail Chime, Mailbox Alert, Mailbox Alarm, Wireless Mailbox Alert. Color: White, Condition: New. Listed at 56.95 USD. Mailbox Alert tells you the moment your mail has arrived. It does so by beeping four times and lighting a bright red LED light in case you didn't hear the four beeps. You’ll love the idea of not wondering if your mail has arrived. You’ll also not need to make numerous trips to your mailbox only to find it empty. And, in addition if you are home, you will also know immediately if someone tries to steal your mail. Simply mount the Sensor on your mailbox door using double-sided tape (included) and plug the Receiver into an electrical outlet in your home. Works with Curbside, Slot and Wall Mounted The Mailbox Alert is made only for small curb side mailboxes. It is not for large heavy metal or aluminum curbside mailboxes. So please do not buy it if you have a large mailbox made of heavy metal or aluminum. Features:Tells the moment you have mail by sound and a red LED lightPackage comes with everything you needIt’s wireless and easy to installWorks 300 to 450 feet depending on environmental objects between the mailbox and home.Has volume controlActs as a security device to prevent mail theftManufactures warranty IncludedBatteries are long lasting and not affected by hot or cold temperaturesFCC approved and UL approvedDeters Theft