It is easy to program or reprogram your KR-S80 series RFID locks.Part of our quality checks for a new purchase we pre-program your lock so we are sure it is functioning correctly and so you can just install it and start using your lock.With each lock purchased from us we email you a User Manual so you have all of the details needed for your lock.If you need a quick reminder of the steps for programming go to our Blog page and you will see a complete step by step for setting up your lock. Just a reminder, don't close your cabinet door until you are sure the lock is still functioning correctly and the way you want it to.