Top positive review
Some install tips...
Reviewed in the United States on February 16, 2021
The Avital 3100LX does not come with a siren. Please read the description, people. I have bought and installed dozens of alarms over the years (Long-ago, I once worked as an audio/video/alarm installer.) You can either choose to purchase a siren of your choice, or you can connect this security system to your horn.
As for outputs: You will need relays, in most cases, to get this alarm to operate your power door locks. The outputs from the alarm are somewhere in the range of 200-300 milliamps, and that is not enough amperage to operate your door locks, in most cases. This unit is manufactured by directed electronics (DEI), the same company that makes Viper, python and several other brands of excellent car alarms. I use this exact model in several of my cars, and have had no trouble out of them. If you are struggling during the install, look up 12volt.com. you can likely find the alarm wiring diagram, plus the location of all the wiring you will need, in your specific vehicle. If you know what you are doing, this is a very easy alarm to install. If you are having trouble with range on the transmitter (remote), try moving the unit to a different place under the dash. You should have anywhere between 500 to 2000 feet of range. The "brain" must be securely mounted to a solid part of the car, otherwise the shock sensor will not work properly.
I hope this helps.