The device shown is an X13 Wireless Signal & Hidden Camera Detector. It is used for detecting hidden cameras, wireless signals, magnetic fields, and GPS locators.
It can detect RF signals from wireless cameras, bugs, and GPS trackers.
It has 6 levels of adjustable sensitivity.
It can detect hidden cameras using infrared lights.
It can detect magnetic fields, which can indicate the presence of GPS devices.
It can detect 2G/3G/4G mobile phone SIM card bugs.
It can detect electromagnetic radiation leaks.
It is portable and easy to carry.