we're familiar with the lte, 4g, gsn, so we can scan and hone in on a particular signal. >> how manyese have you sold to law enforcements. >> thousands to different agencies to different groups. everything from guys tracking down drug dealers, maybe that have gps trackers -- >> can i hold it? >> sure. >> so you have sold thousands of these to law enforcement. why do you think they are keeping relatively quiet about the use of these devices. >> number one there is no law against using these devices. if you contrast it to some of the other intercept devices where they are truly tracking a person, they can have access to content there. so there's different privacy laws that can be broken, where there is not. so there's certainly a fine line there, and this is on the side where you don't have any problems. >> could you see how it could be abused? >> sure, absolutely. we can sell to the general public, corporations if they want to keep a secure board room, for example, so nobody can ease drop. >> he said it is not possible to shield your phone. >>> we are getting a stunning look at the no