Muffler wired cameras. Jammer, locking camcorder.

The system of " Locking camcorder " makes a certain range of electromagnetic waves, which affect the operation of the matrix of all modern digital camera, video camera cell phone, car DVR, hidden camera, security camera.
The matrix of any camcorder, located within a radius of action "Locking camcorder", it displays only the noise in a dark screen. VideoWorms.com