There is one BT-760 tag (its predecessor has two) and no BTR-101 immobilizer relay in the Pandect X-1800 L’s set. On the other hand, it has the RMD-4m relay module and the PS-330 siren, which the Pandect X-1800 BT does not.
The novelty allows you to control your car via both GSM and Bluetooth: choose the former if you’re far away from the car, and the latter if the car is within a 50 m (165 feet) distance. You can use your smartphone, tablet or laptop to control the system and receive notifications from it.
Pandect X-1800 L features remote start, and in most cases doesn’t require the OEM key as it can bypass the car’s immobilizer algorithmically.