1.This product uses a passive, wireless and infrared scanning technique, it can detect eavesdropping, telephone eavesdropping, meetings eavesdropping, GPS location trackers, car eavesdropping, wireless pinhole cameras, cable cameras, electrical radiation sources andso on.2.Can detect radio waves, 2G,3G,4G mobile signal, SIM card bug. Frequency detection range 100Mhz - 2.7Ghz.3.This camera detector has 6 levels of sensitivity, which allow you to accurately find the signal source. Effective detection of 10 range area.4.Rechargeable battery, 2-3 hours fast charging. Each full charge can be used for 10 hours(the duration depends on the usage mode).5.Our anti spy pen use ABS material, Portable like a pen (only 36g), easy to carry and store, for home, office, travel, and etc.