Wireless Video Signals(Wi-Fi) And Camera Lens Detector At a Glance... Counter surveillance Spy Camera Detector Proximity detection alert Find hidden camera lenses Detect wireless video signals Alerts you when it detects wireless signals Manufacturers Specification Primary Function: Wifi Detector and Camera Lens Finder Material: Hard Molded Plastic Detecting Wave Distance: 920nm Receiving Range: 1MHz - 6500 MHz Optic Lens: Professional Grade IR Lens Power: AAA Battery x 2 (Not Inlcuded) On Board Buttons: - Retractable Antenna - Sensitivity +/- Control - OFF, Audio Alarm, Proximity Alarm, LED Indicators Fro Proximity Detection Dimensions: L: 107 x W:50 x D:17 (mm) Manufacturers Ref: LUI878FP982F Product Notes Detects up to 6.5GHz wireless video signals A great tool to find hidden lenses anywhere in your home or office. Always worried about hidden cameras in ornaments or that little hole in the ceiling, then find them with this camera lens finder. Portable, can be used anywhere, take it with you to hotels, motels and make sure no one is watching Package Contents for CVMV-J19 Wifi and Lens Detector Screen Cloth User Manual - English FAQ - Frequently Asked Questions What are the four LED indicators for? The 4 LED indicators light up in sequence as you get closer to the wifi signal. Very cool.