A DIY viewpoint applied to doors for dynamic surveillance of the direct exterior and the security of the interior while occupied in insecure rooms (e.g., hotels).

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Improvised Proximity Alert MethodsImprovised Proximity Alert Methods Noopel Portable Security AlarmNoopel Portable Security Alarm Portable Door Lock DevicePortable Door Lock Device VOSKER V150 Cellular Security CameraVOSKER V150 Cellular Security Camera