Which brand of anti-monitoring detector is good?

The better brands of this product are Komi, Dongmei and so on.

1, Komi: Komi portable hotel anti-theft detector, anti-monitoring detector, anti-eavesdropping detector, GPS detector, camera detector, detector KD20.

2, Dong Mei: Dong Mei anti-monitoring detector wireless signal GPS detector portable anti-camera anti-monitoring hotel anti-theft detector K 19 camera detector. Anti-monitoring detectors of brands such as Ansi and Anrui are also good.