A portable multifunctional detection instrument is provided. The portable multifunctional detection instrument includes a housing. The housing is provided with a handheld part. A control circuit board is disposed in the housing. An infrared detector and a red light generator are disposed on the housing. Both the infrared detector and the red light generator are electrically connected to the control circuit board. The infrared detector is configured to detect red light emitted by a camera. The red light generator is configured to emit red light toward the camera. The control circuit board is further provided with a signal detection module to detect whether a communication signal exists around.

A portable multifunctional detection instrument is provided. The portable multifunctional detection instrument includes a housing. The housing is provided with a handheld part. A control circuit board is disposed in the housing. An infrared detector and a red light generator are disposed on the housing. Both the infrared detector and the red light generator are electrically connected to the control circuit board. The infrared detector is configured to detect red light emitted by a camera. The red light generator is configured to emit red light toward the camera. The control circuit board is further provided with a signal detection module to detect whether a communication signal exists around.

A portable multifunctional detection instrument is provided. The portable multifunctional detection instrument includes a housing. The housing is provided with a handheld part. A control circuit board is disposed in the housing. An infrared detector and a red light generator are disposed on the housing. Both the infrared detector and the red light generator are electrically connected to the control circuit board. The infrared detector is configured to detect red light emitted by a camera. The red light generator is configured to emit red light toward the camera. The control circuit board is further provided with a signal detection module to detect whether a communication signal exists around.

A portable multifunctional detection instrument is provided. The portable multifunctional detection instrument includes a housing. The housing is provided with a handheld part. A control circuit board is disposed in the housing. An infrared detector and a red light generator are disposed on the housing. Both the infrared detector and the red light generator are electrically connected to the control circuit board. The infrared detector is configured to detect red light emitted by a camera. The red light generator is configured to emit red light toward the camera. The control circuit board is further provided with a signal detection module to detect whether a communication signal exists around.