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Laser bug has not been widely used by intelligence agencies because it is difficult to hide and its eavesdropping effect is poor, right?
Wrong. According to the test questions and answers of the online training exam for secret education in 2023, it is wrong that the laser bug is not widely used by intelligence agencies because it is difficult to hide and the eavesdropping effect is poor. The laser monitor is a device that receives feedback signals by laser beam hitting the room glass, and the monitoring distance can reach 1000 meters.
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