How long is the power cord to the Siren+Keypad? Jon Dennis Cruz April 01, 2021 10:51 Updated The power cord for the Siren+Keypad is 2 meters or 78 inches. Related articles How long will my batteries last? I’m concerned about privacy and the Siren listening in on me. What do you have to say to that? Comments 0 comments Please sign in to leave a comment.