This radio detector can detect whether a car has been installed with a GPS locator, whether there are wireless eavesdropping or wireless sneak camera devices in the hotel, or detect whether your mobile phone has been tapped. As long as the radio wave signal is within 1MHz-10GHz, it will be detected. If you want to detect whether your mobile phone has been tapped or the camera has been maliciously turned on, you can turn off the data Internet switch and wifi switch of the mobile phone, turn off the screen, and then put the detector next to the mobile phone. If the mobile phone itself transmits a signal for no reason, it means that it has been monitored or has been secretly photographed. According to the signal strength and distance of the device under test, the sound alarm threshold can be set (rotate the knob in the upper right corner to adjust). When the received signal reaches the threshold, the detector will sound an alarm prompt! The closer the distance to the device under test, the larger the displayed value is, the stronger the signal is. 1. Product model: RF-10G 2. Detection frequency range: 1MHz-10GHz 3. Detection sensitivity: -60dbm to 0dbm (if the input power is too high, please connect an external attenuator to avoid burning the detector) 4. Digital display range: 000 to 999 (refreshed 3 times per second) 5. Built in buzzer alarm prompt (the alarm threshold can be freely adjusted by the user) 6. Built in 1500mAH rechargeable lithium battery 7. Charging interface: Micro-USB 8. Charging input voltage: 5v/1A 9. Charging: When charging on, the three decimal points of the digital display will flash quickly, and when fully charged, it will flash slowly. Color: Black Material: Aluminum Alloy Package Contents: 1x RF Signal Finder