Envelope X-Ray Spray Covert Spy Gadget
See the Contents of Envelopes Without Being Detected!
Envelope X-RAY Spray turns opaque paper temporarily translucent, allowing the user to view the contents of an envelope without ever opening it!
30 seconds after the application, the envelope will return to its original state, leaving absolutely no markings, discoloration, or other indications of use. Each can treats several hundred square inches. The spray is non-conductive, non-photochemically reactive, contains no Freon and is environmentally friendly!
WARNING: Not to be used on U.S. Mail, except by, or with the express permission of, the addressee.