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A hidden camera can be wired or wireless.Hidden cameras are connected, by cable or wirelessly, to a viewing or recording device, such as a television, computer, videocassette recorder, network video recorder, digital video recorder, memory card, or another data storage medium.
Analog wireless is found in three frequencies: 900 MHz, 2.4 GHz, and 5.8 GHz. Currently, the majority of wireless security cameras operate on the 2.4 GHz frequency. Most household routers, cordless phones, video game controllers, and microwaves operate on the 2.4 GHz frequency and may cause interference with a wireless security camera.
A Black Hornet Nano helicopter unmanned aerial vehicle (UAV) (2013) The Black Hornet Nano is a military micro unmanned aerial vehicle (UAV) developed by Prox Dynamics AS of Norway, and in use by the armed forces of Norway, the United States, France, the United Kingdom, Germany, Denmark, Algeria, Ireland, Australia, the Netherlands, Poland, New Zealand, India, Turkey, South Africa, Ukraine and ...
All models use Secure Digital (SD) or Multi Media Card (MMC). They come with a small amount of internal memory and are not bundled with a memory card. Many Exilim cameras come with a bundled charging and docking cradle. The cradle is used to recharge the camera's battery and to connect the camera to a PC or PictBridge compatible printer.
Of memory cards (i.e. intended as such, to use e.g. internally), SD cards allow for largest capacity by far (with SDUC variant up to 4 TB max. currently available, and the spec allocs up to 128 max.), though the much bulkier CFexpress cards can also match the capacity.
Eye-Fi was a company based in Mountain View, California, that produced SD memory cards with Wi-Fi capabilities. Using an Eye-Fi card inside a digital camera, one could wirelessly and automatically upload digital photos to a local computer or a mobile device such as a smartphone or tablet computer. The company ceased business in 2016.
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