such as zip buttons and buttonholes automatic buttons belts and buckles adhesive velcro etc an intrusion preventing versatile device 2 comprises a flexible support 21 stretched and fastened inside the envelope 1 along the edges 11 and 12 of the opening through a sheath 22 the sheath 22 is fastened inside the envelope 1 by means of removable elements not shown such as buttons automatic buttons adhesive velcro etc sewed inside the edges 11 and 12 of the envelope 1 the flexible support 21 supports a flexible printed circuit pcb 23 on which several surface mounted smd electronic components 24 are applied together with activating means 25 of the device 2 and electronics 26 the components 24 are communication interruption sensors microphones on off control switches temperature sensors etc the activating means 25 can be of various types if for example they were composed of a simple pushbutton switch they would allow turning the device 2 on through a simple pressure as preferred alternative the activating means 25 can be composed of a biometric sensor which therefore can be actuated only by the rightful owner of the device 2 for whom such sensor 25 has been set the biometric sensor 25 can be a face reader a fingerprint reader etc the flexible printed circuit 23 is connected through a connector 28 to a box 27 containing an electric energy supply and a sound luminous vibrating signaling device etc the biometric sensor 25 is placed inside the envelope 1 in a position which can be easily reached by the owner to activate deactivate the biometric recognition the features taken into account by the recognition system can be fingerprints iris color and size retina hand shape hand palm vascularization vocal imprint etc the detection system.