I have this old 2 button remote cobra alarm that came with the 2nd hand car.
Button A - lock(alarm activated) and unlocks(alarm deactivated) the car.
Button B - park light flashes when you hold this button. What's the use of this button?

I can't seem to find any manual of this alarm in the internet. Sometimes the alarm switches to Valet Mode. I don't know what's causing it. When I press Button A it just lock and unlocks the car with no chirping sound. Pressing "button B" doesn't seem to help. When this happens I have to reconnect the battery of the car to enable the alarm again.

Red Led blinks - alarm is enabled
Red Led doesn't blinks - valet mode

Anyone knows how to use this alarm? How to switch to Valet Mode and Armed back the alarm again? and what's the use of the 2nd button?