A surveillance detector is a small, handheld device that scans an area for eavesdropping devices and surveillance taggers (see below) . When activated, the surveillance detector grants a + 10 equipment bonus to Perception checks for locating active or passive surveillance devices within 6 squares of the detector. It can be set to either display the presence of eavesdropping or to emit an alarm when such attempts are detected.

Source: Galaxy of Intrigue, p. 67.