The Radio Shack 63-1110 Wireless Mail Guard is a reliable and convenient solution for protecting your mailbox. With a wireless operating range of 150 feet and a white color design, this mailbox alert protector from RadioShack is both practical and aesthetically pleasing. The unit requires a 12V battery power source and offers instant alerts for added security. Whether used indoors or outdoors, this mailbox sensor provides peace of mind whenever you are away from your mail.