Buyers must prioritize frequency compatibility, typically 58KHz (Acousto-Magnetic/AM) or 8.2MHz (Radio Frequency/RF), to ensure the tags work with existing EAS (Electronic Article Surveillance) systems. Additionally, evaluate the magnetic lock strength, measured in Gauss; Superlock (≥10,000GS) is recommended for high-risk retail environments to prevent unauthorized removal using standard magnets. The detection range is also critical, as high-quality tags should be detectable at a distance of 1.2 to 2.0 meters between pedestals.