Product Data Sheet 3-Series Security Keypad (MSO) 3400 Last Updated: April 2016 Product Overview The 3-Series Security Keypad gives users an easy-to-use and Learn how to troubleshoot issues with your Centralite Wireless Keypad for Xfinity Home. Low Battery Alert. Replace the batteries. Just to add a couple of things. According to the manual i have found online device is operated by pressing one of the top three buttons and entering 4 digitCentralite 3400-C 3-Series Security Keypad · Easy arm/disarm of security system · Large LED status indicators · Proximity sensor for detecting users · Two mounting View and Download Centralite 3 Series product data sheet online. Security Keypad MSO. 3 Series keypad pdf manual download. Also for: 3400-g. Learn how to install or replace batteries in the Centralite 3400 Keypad. What You'll Need. Xfinity Home; 3400 Keypad; Two CR123A batteries