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
Autowatch
Dynatron
D2200 (aka Cyclops P205)
D3400 (aka Cyclops P355)
D3600 (aka Cyclops P375)
D3800 (aka Cyclops P385)
D4400 (aka Cyclops P455)
D4600 (aka Cyclops P475)
D4800 (aka Cyclops P485)
D7400 (aka Cyclops P755)
D7600 (aka Cyclops P775)
D7800 (aka Cyclops P785)
Viper