If you need to partially conceal your cameras from view, wireless security cameras are the way to go. Locations such as banks use a combination of wireless and wired, visible and hidden cameras to intimidate potential robbers, but continue photographing them even if they disable the wired cameras.
Look around you the next time you enter a bank. There are cameras evident and these are for publicity purposes. That is, they are there to intimidate a potential robber or petty thief from doing anything, knowing that their actions are being recorded. The owners of these establishments want you to see these cameras and they want you to think twice about doing anything naughty in their places of business.
Then there are the hidden cameras. Almost always wireless so they can be placed anywhere, they photograph through small holes in the walls or ceilings, or from behind specially designed ordinary devices youd expect to find in the location. Wireless security cameras are the ones that provide information to the police about who may have committed some crime after they disabled the visible systems.
Wireless cameras can be battery operated. That is, they are used to monitor the activities of people for a limited amount of time. Their advantage is that they can be placed in a variety of easily concealed positions, much more so than a camera that requires a wire to be connected to both its power source and a recording device.
Lately, these cameras have been built into clocks, childrens toys and other common household devices and have been nicknamed nanny-cams. They came into more popular use to catch babysitters and nannys who watch over precious youngsters who may not be talking yet. Horrible abuse sometimes occurs when unbalanced adults are left in charge of toddlers who cant speak.
Concerned parents started using these devices to record the actions of the adult in charge while they were gone. Then the couple could play back the tapes and see what went on in their absence. Some of these tapes were so outrageously awful in what they captured on videotape that they led to prosecution of the adult offender and oftentimes ended up on national tabloid TV shows. Since then they have become a built-in, cleverly concealed device thats quite often found in homes where young children are being watched by hired help.