[Signal Detection] this product can detect radio waves, 2G, 3G, 4G mobile signals, frequency detection range 1Mhz-6.5 Ghz. Detection Range: 10 cm ~ 15 meters, to help you trust the environment[Privacy Safety] This product uses a passive, wireless and infrared scanning technique,It can accurately detect: telephone eavesdropping, GPS location trackers, car eavesdropping, wireless pinhole cameras, cable cameras, electrical radiation sources andso on.Can effectively prevent your privacy leaks[Sensitivity] can be changed through the button, increase sensitivity, expand detection range, reduce sensitivity, shorten detection range, faster identification of astronomical radio source.[Durable and lightweight] Small size, light weight, suitable for hotel, conference room, bathroom, changing room, residential, office, examination room, etc. . The built-in battery can be used for about 25 hours after charging (the length of time depends on the mode of use) . There is no need to change the battery, so it is easy to use and carry.[Long-life dual mode] FASKRO devices can be recharged to provide 25 hours of working time, choose FASKRO, in addition to providing 247 customer support services, will receive a one-year service warranty and 100% Customer satisfaction. This product is a kind of anti-camera products, suitable for hotels, cars, secret meetings, can look for 4G, 5g, WIFI signal and find the source.