IMMOBILIZER FOR 12/24V TRUCKS; ELECTRONIC PROXIMITY DEVICE PROTECTS THE VEHICLE BY BLOCKING THE CIRCUITS OF THE ELECTRICAL INSTALLATION AND SHORT-CLOSE THEM ONLY AFTER THE KEY FOB - TRANSPONDER IS PRESENTED WITHIN THE RANGE OF THE READER IN THE FORM OF A HIDDEN LOOP; HAS TWO CIRCUITS THAT BLOCK THE ELECTRICAL SYSTEM; SERVICE MODE; EMERGENCY DISARMING OF THE SYSTEM WITH A PIN CODE; NON-VOLATILE MEMORY IN THE EVENT OF POWER DISCONNECTION; TECHNICAL SUPPORT AND ASSISTANCE DURING INSTALLATION - SEE PICTURES