It's missing the mounting plate.

The Ring Alarm Home 1st Gen Keypad in White is a wireless security keypad with a mounting bracket, designed specifically for use with Ring devices. It features smart home compatibility with Amazon Alexa and can be connected wirelessly for easy setup. The keypad also has the ability to link alarms via Wi-Fi, providing added security features for your home. This unit is compact, with dimensions of 0.75 inches in depth and 4 inches in height, and it weighs 12.3 ounces. Overall, this keypad is a convenient and reliable option for enhancing your home security system.