This discreet little device protects you against intrusion, either physical and by hidden camera. It alerts you to the presence of hidden cameras in hotels, rental rooms or public places. The red LED light emitted by the device is reflected by the camera, illuminating the red dots on the device. It also has a "mobile alarm" function, which detects even faint movements, alerting you to an unwanted physical intrusion. This is the perfect travel companion to keep you and your belongings safe.