Smart security device and system

A smart security device comprising:

• a housing, and
• electronics provided in the housing, the electronics comprising
• a tag uniquely associated with the smart security device and configured to automatically and periodically emit a first signal, the first signal being a Bluetooth signal configured to be sent and received via a Bluetooth low energy wireless personal area network;
• a NB-IoT module configured to send and receive signals via a NB-IoT network;
• a cable having a free end and a secured end, the secured end being secured to the housing and in electrical connection with the electronics;
• and
• a lock assembly at least partially provided in the housing, the lock assembly comprising:
• a body comprising a cable passage configured for passing the free end of the cable therethrough and for immobilizing the cable therein,
• a lever having a free end and a pivoting end, the pivoting end pivotably connected to the body, the lever having a resilient plate provided thereon, the resilient plate configured to exert a force on a cable immobilizer against the cable to immobilize the cable in the cable passage when a side of the lever facing the body is brought into contact with a side of the body facing the lever while the cable is in the cable passage, and
• a fastener configured to secure the lever to the body when the cable is immobilized in the cable passage.