Learn what PIR motion detection is, how passive infrared sensors detect movement, why false alerts happen, and how PIR compares with other motion detection methods.

Can your neighbor point a security camera at your house? Learn how U.S. privacy laws generally apply, when a camera may cross the line, and what you can do about it.

Learn how to stop security camera false alerts caused by wind, rain, shadows, animals, cars, and lighting. Follow practical steps for zones, sensitivity, AI detection, and camera placement.

Compare 1080p vs 2K vs 4K security cameras by image quality, viewing distance, storage, bandwidth, night vision, and real-world home security needs.

Learn how much storage security cameras need for 24/7 or motion recording. See practical storage estimates, formulas, examples, and tips for choosing SD cards, NVR drives, or cloud storage.

Can security cameras work without internet? Learn how SD cards, DVRs, NVRs, PoE systems, and cellular cameras work offline and which features stop working.