When evaluating mobile camera jammers, you must focus on the shielding radius and frequency range. A professional-grade device should cover frequencies used by wireless cameras, including 2.4GHz, 5.8GHz, and Bluetooth bands. Ensure the device features high-gain omnidirectional antennas for 360-degree coverage and a robust cooling system (such as built-in fans or aluminum heat sinks) to prevent frequency drift during prolonged operation. For portable units, a lithium battery capacity of at least 2000mAh is recommended to ensure 1-2 hours of continuous use.