A basic security system includes a remote control or a smart phone app, which you can use to turn on and off the security system from outside the car. These systems may also include sensors to indicate if the hood, trunk, or any door has been opened while you’ve been away from your vehicle.
If any of these events are detected, the alarm system will sound a loud siren and will render the vehicle inoperable while the siren is sounding. Some systems include two-way communication to alert you through the remote control or smartphone app.