Functionality is great for detecting signals, found a hidden govee hydrometer I had lost a couple months ago, then a pair of headphones. The low sensitivity is great for inside the house where WiFi and other BTE devices are already active. Turn on the vibration as is makes it much more obvious. Use the antenna!High sensitivity works great outside such as around your car or in an area with little noise from wireless light bulbs, cameras etc. Start in low sensitivity then turn everything off and move to high on suspect devices. Used my phone with Bluetooth and WiFi off as bait hidden in my car but was still able to find it fairly easily.Found an interesting transmition coming from the new LED light poles installed outside when I was messing around. Also one of our supposedly Bluetooth only lightbulbs...has an IP address and occasionally sends data via Wifi 'somewhere' on the internet, great find and terrifying. The antenna seems to work directionally, pointing it directly at something like a router points it's exact location.The 'hidden camera' finder is...not very useful to be honest either I don't understand its functionality but you basically have to be looking DIRECTLY at the camera and almost EXACTLY where it's pointing at to actually see anything, so essentially, knowing where the camera is at with a leeway of about a 10°-15° cone from the center where the cameras pointing. Tested this on a Nest night vision, Webcam, a Canon and other more high end mounted cameras without much success. Works great on Cats eyes though! Spot them a mile away.Privacy is hard these days, have a look around amazon. USB chargers with hidden cameras are the norm, the smallest wireless camera is smaller than your pinky nail. They sale 6mm screw heads as cameras, that's a 1/4in screw...Our concerns ended up being hacked Google Chrome Accounts connected to Nest camera...Whoops.For those dealing with strange digital issues or identity theft search the news for:Malware Abuses Google OAuth endpoint to revive cookies, hijack accounts.Stay Safe and Good luck!