Tech fans have found it can see through thin plastic (like on a TV remote) as well as black clothing like t-shirts. When using infrared, the camera can pick up a type of radiation that’s invisible to the human eye. The well-known YouTube gadget channel Unbox Therapy also used the OnePlus 8 Pro to look through clothing.

RF radiation has lower energy than some other types of non-ionizing radiation, like visible light and infrared, but it has higher energy than extremely low-frequency (ELF) radiation. If RF radiation is absorbed by the body in large enough amounts, it can produce heat. This can lead to burns and body tissue damage.

The device, called Walabot, can look through walls to detect structural foundations, plastic and metal pipes, electrical wires and studs.

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Hanson 03040 Magnetic Stud Finder. After 30 hours of research and testing against five other magnetic stud finders, we found the C.H. Hanson to be reliable, durable, and accurate, and we also like it because it doesn’t need batteries or any kind of calibration.

In some places, you’ll hear a hollow sound. Other areas will sound more “solid.” The “solid” sound indicates you have knocked on a stud. Studs are located about 16 to 24-inches apart. Measure this distance away from either side of the first stud and knock on the wall again to hear if you’ve hit another one.

Like many old-fashioned stud finders, most stud finder apps are magnetic, meaning that they simply rely on the phone’s built-in magnetometer to locate metal objects inside walls. Once it has been set up, the Walabot stud finder app works on drywall. It detects water pipes, conduit, wiring, and studs.