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2. Wireless security camera - Wikipedia

   en.wikipedia.org/wiki/Wireless_security_camera

   Digital wireless camera. Wireless security cameras are closed-circuit television (CCTV) cameras that transmit a video and audio signal to a wireless receiver through a radio band. Many wireless security cameras require at least one cable or wire for power; "wireless" refers to the transmission of video/audio.

3. Home security - Wikipedia

   en.wikipedia.org/wiki/Home_security

   Closed-circuit, or CCTV cameras, stream through wired or wireless links. [9] These cameras stream live footage to users, allowing them to watch for suspicious activity. Current cameras feature abilities such as motion detection and two-way audio, allowing users to receive notifications of activity and speak and listen through the camera.

4. WiFi Sensing - Wikipedia

   en.wikipedia.org/wiki/WiFi_Sensing

   “FIMD: Fine-grained Device-free Motion Detection,” 2012 IEEE 18th International Conference on Parallel and Distribution Systems, pp. 219-234 “E-eyes: Device-free Location-oriented Activity Identification Using Fine-grained Wi-Fi Signatures” from 2014 at the 20th annual international conference on Mobile computing and networking

5. The 8 Best Outdoor Security Cameras for Your Home - AOL

   www.aol.com/lifestyle/7-best-outdoor-security...

   If you’re looking to buy a multi-camera system right away, the Arlo Ultra 2 (three Camera Set) gives you a trio of powerful security cameras. Each one can record 4K HDR video with a 180-degree ...

6. 6 Electronics Retirees Should Buy From Costco on Black Friday

   www.aol.com/finance/6-electronics-retirees-buy...

   This system will include the base station, keypad, range extension, motion detector, panic button and three contact sensors. ... This system includes four wireless outdoor cameras and two indoor ...

7. Motion detector - Wikipedia

   en.wikipedia.org/wiki/Motion_detector

   A motion detector attached to an outdoor, automatic light. A motion detector is an electrical device that utilizes a sensor to detect nearby motion (motion detection).Such a device is often integrated as a component of a system that automatically performs a task or alerts a user of motion in an area.