Firstly, the operating frequency of acoustic-magnetic anti-theft devices is 58 kHz, which falls within the ultra-low frequency range, while radio frequency (RF) anti-theft devices operate at 8.2 MHz, an ultra-high frequency. The extremely high frequency of RF devices may cause resonance with everyday items containing magnetic cores, such as mobile phones and bank cards, leading to false alarms or missed detections. Additionally, this high frequency makes RF devices highly susceptible to interference from nearby large electromechanical equipment, such as elevators, air conditioners, and refrigerators, which can significantly reduce their detection effectiveness. Therefore, in terms of both anti-interference capability and alarm accuracy, RF systems are far inferior to acoustic-magnetic systems.

However, acoustic-magnetic anti-theft devices are generally slightly more expensive than RF devices, and the same applies to their corresponding security tags. When selecting an anti-theft system for supermarkets, businesses can choose between acoustic-magnetic and RF systems based on their specific circumstances. If the budget allows and the goal is to minimize post-installation issues, the acoustic-magnetic system is the recommended choice. If the budget is limited and the operational environment is relatively free from interference, opting for an RF anti-theft system is also a viable alternative.