[Upgraded Mailbox Chime Alert]: Our newly designed mailbox sensor helps you and your family avoid frequent trips to check the mail during cold winter nights, reducing inconvenience and saving time. The mailbox alert system adds an extra layer of security for your mail. <br>[Enhanced Coverage and Expandable Pairing]: The mail alert receiver operates up to 800 feet in an unobstructed area, ensuring reliable signal transmission. It supports pairing with multiple transmitters, making it ideal for homes or offices with more than one mailbox. <br>[Instant Alerts and LED, Music Notification]: When the mailbox is opened, the receiver emits an ble alert and activates a blue LED light that continues to flash until manually stopped. Choose from three different alert tones to personalize your notification experience. <br>[Easy Installation]: This mailbox alarm is battery-powered and wire-free for simple setup. It is compatible with various mailbox types, including standard, wall-mounted, and slot mailboxes. Adjust settings easily based on your mailbox type. <br>Color: White <br>Material: Plastic <br>Package Contents: 1 set * Mailbox Alarm. Only the items listed are included; other accessories are not included. <br>Note: Lighting and display differences may cause slight variations in color between the image and the actual item. Measurement may vary by +/- 1-3 cm.