When evaluating IR cameras, you must prioritize the Infrared Night Vision Range, typically measured in meters (e.g., 20m, 50m, or 100m), and the Sensor Resolution (minimum 4MP/2K for professional security). Pay close attention to the IR-Cut Filter technology, which ensures accurate color reproduction during the day and high sensitivity at night. Additionally, verify the Ingress Protection (IP) Rating, such as IP66 or IP67, to ensure the hardware is waterproof and dustproof for outdoor environments.