The following user manuals are all in PDF format. I recommend keeping a copy of your alarm manual on your smart phone for reference Cobra AB3868 4100 (AK4198/AK4138) 4600 (AK4615/AK4625) AB7928 Autowatch 279RL 446RLi (AU) (446RiS/446RiSG) 446RLi Premium 458RL 500RLi … Continue reading User Manuals