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2. Wireless security camera - Wikipedia

   en.wikipedia.org/wiki/Wireless_security_camera

   However, some wireless security cameras are battery-powered, making the cameras truly wireless from top to bottom. Wireless cameras are proving very popular among modern security consumers due to their low installation costs (there is no need to run expensive video extension cables) and flexible mounting options; wireless cameras can be mounted ...

3. Dashcam - Wikipedia

   en.wikipedia.org/wiki/Dashcam

   The resolution will determine the overall quality of the video. Full HD or 1080p (1920×1080) is standard for dash HD cams. Dash cameras may have 1080p, 1296p (common for Chinese dashcams), 1440p, or higher definition for a front camera and 720p for a back camera and include f/1.8 aperture and night vision mode.

4. Wireless power transfer - Wikipedia

   en.wikipedia.org/wiki/Wireless_power_transfer

   In 2015, researchers at the University of Washington introduced power over Wi-Fi, which trickle-charges batteries and powered battery-free cameras and temperature sensors using transmissions from Wi-Fi routers. [124] [125] Wi-Fi signals were shown to power battery-free temperature and camera sensors at ranges of up to 20 feet. It was also shown ...

5. Cordless - Wikipedia

   en.wikipedia.org/wiki/Cordless

   The term "wireless" generally refers to devices that use some form of energy (e.g., radio waves, infrared, ultrasonic, etc.) to transfer information or commands over a distance without the use of communication wires, regardless of whether the device gets its power from a power cord or a battery.

6. Covert listening device - Wikipedia

   en.wikipedia.org/wiki/Covert_listening_device

   A covert listening device, more commonly known as a bug or a wire, is usually a combination of a miniature radio transmitter with a microphone. The use of bugs, called bugging, or wiretapping is a common technique in surveillance , espionage and police investigations.

7. Google Nest - Wikipedia

   en.wikipedia.org/wiki/Google_Nest

   Nest Cam Outdoor was announced in July 2016 and is a version of the Nest Cam adapted for outdoor monitoring. The main differences from the Nest Cam Indoor is in its design which is built to withstand outdoor conditions. [70] In 2021, Google announced the second-generation, battery-powered Nest Cam Outdoor. [67]