The quick and dirty method is to point your phone at the suspicious device in total darkness. A modern smartphone will pick up the infrared (your eyes won't). O

The quick and dirty method is to point your phone at the suspicious device in total darkness. A modern smartphone will pick up the infrared (your eyes won't). Or get yourself a simple RF detector (or even a Software Defined Radio). You might find this presentation useful (!PDF!). https://defcon.org/images/defcon-22/dc-22-presentations/Polstra/DEFCON-22-Phil-Polstra-Am-I-Being-Spied-On.pdf https://defcon.org/images/defcon-22/dc-22-presentations/Pols... Privacy is a human right. Best of luck!