When you plan to purchase a hidden camera, it is usually for a specific application. For example, you may want to check what your children are doing while you are not at home or collect evidence of a theft in your company. Whatever the reason is to purchase a hidden camera, it is wise to set certain requirements for the hidden camera based on the application and situation. 
For example, when buying hidden cameras you can make a selection based on the minimum required battery life, how you want to view the images and whether the hidden camera must already be concealed in a product or whether you want to eliminate the hidden camera itself.
Minimum battery life hidden camera:
Most hidden cameras that are hidden in a pen or key ring, for example, have a limited battery life of around 1.5 hours. For situations where, for example, you want to film an entire day, these hidden cameras are not suitable. However, special hidden cameras have been developed for this that can either film on the internal battery for a longer period of time or are hidden in an object such as a clock radio or clock and use the power from this.
Install the hidden camera yourself or buy a built-in camera
Besides hidden cameras in a smoke detector, clock or other user items, there are also mini camera sets that you can hide or build in yourself. The mini camera sets usually consist of a hidden camera with pinhole lens and a recording system. These hidden cameras must always be supplied with power with an adapter and therefore especially suitable when there is a system ceiling at the location.
Watch the hidden camera images:
99% of all hidden cameras or mini camera sets take the images with an SD card if necessary. sound up. The advantage of this is that the memory is relatively cheap and easy to read. Also, hidden cameras that use an SD card as storage do not make any sound during recording as opposed to hard disk recorders. Viewing the images is easy by either connecting the hidden camera to the computer or inserting the memory card directly into the computer. The video images can be played with a standard media player.
Watch images of hidden cameras directly:
With hidden cameras that work on an SD card, it is only possible to watch directly if you connect the camera to a monitor with an AV cable. If you want to watch from a distance without a cable, this is possible with a wireless camera or an IP camera. With wireless cameras you have a camera and a receiver, where you can connect the receiver to a monitor to directly see the images. Nowadays there are also different IP hidden cameras that work via the internet. These can therefore be viewed from any computer in the world with an internet connection. Read more about the operation of IP cameras here. https://www.sitcon.com/blog/hoe-werkt-een-ip-camera/
Buy hidden camera:
To buy a hidden camera, click here: Spy Cameras
