This advanced RF detector is tucked away inside a fully functional, ordinary-looking black pen. This device can help you detect RF signals, including those emitted by cell phones (up to a 10 meter range). Upon detecting a cell phone or wireless signal, the red LED within the top of the pen will begin to flash, alerting you that you may be under surveillance. Lightweight and ultra-portable.
See the Uses tab for some interesting ways this pen can work for you, even if you're not a spy, detective, or investigator.
Secure an area for a meeting. Ensure it stays secure.
Flip that around on the security thing. If you've been assured there's RF monitoring for your security, you can trust but verify.
Know if your own RF monitoring has been compromised.
Become aware of rolling surveillance that's tracking you with RF while you drive.
Detect a stalker who's using gear to spy on you.
Detect unwanted surveillance by private detectives or government authorities.
And you can think of many more uses, depending on your situation. This detector, being a functional pen rather than just a detector in a dummy shell, is about as discrete as you can get. Lots of possibilities for you!