This is the base station, the heart of your Ring Alarm Security Kit. Either connect to it using your local Wi-Fi network or with a spare Ethernet cable (that accessory doesn't come with your purchase).
The base station supports Ethernet, Wi-Fi, Z-Wave, ZigBee and Bluetooth.
The keypad is where you arm and disarm your system. You create a secret PIN code when you set up your system; use that to both arm and disarm your system at the keypad. You can also use the Ring app for arming and disarming.