PS4004R Electronic Cylinder Door Lock with Keypad Access – Right Hand Swing Doors Review Gobling June 12, 2018 August 29, 2018 No Comments on PS4004R Electronic Cylinder Door Lock with Keypad Access – Right Hand Swing Doors Review This Programmable cylinder style Digital Electronic lockset stores one Master and 9 individual User codes. The 4 AA batteries last up to six months and are easy to find and replace. Advance Low battery Alarm