I also have a Cobra alarm fitted. A bodyshop wrecked my original Scorpion by allowing the battery to go flat and when the alarm went off, they decided to start pulling fuses instead of using the siren key I'd provided them with AND told them about specifically or even just charging the battery. As a result, the Scorpion went into some tamper mode and wouldn't come out of it. Idiots.
So instead they fitted a Cobra alarm.
It uses less power than the Scorpion alarm.
It can lock the doors when the car's moving.
Everything else. It really is a pile of poo.
Some features are just jokes. e.g. the car finder. Owing to the abysmal range of the remote control, the car finder feature only works if you're standing within about 2 metres of the car. Brilliant.
It has a feature that could in theory be useful. It's supposed to flash the hazard lights when it detects emergency braking. Except it also flashes the hazards when slowing for a corner in normal driving. Hardly an emergency stop!
The manual says it has the ability, with a suitable interface, to pop the boot open. In the absence of any technical information in the manual, I put an oscilloscope on it to find out what it does to signal the interface. And no signal was found. I phoned them up and was told that it doesn't actually have the feature enabled even though it's documented in the manual and available in the setup menus.
Cobra : avoid like the plague in my opinion.
This of course doesn't help the OP. Except I'd advise slinging it and fitting something that actually works.