In the past few years, we have covered plenty of robots from SuperDroid Robots here. Their security robots are also worth a look. They are capable of detecting objects and people, reading vehicle license plates, and integrating with security system.
Spar has a weatherproof chassis, omni-directional wheels, and 360-degree surveillance camera. It comes with 4G and WiFi connectivity. Spar has infrared cameras for night patrols. It also has autonomous ROS SLAM navigation with GPS, 360-degreee 3D LiDAR, IMU, and on-board computers.