There are lots of Chinese branded ones in the market and they cost >65 $ and they aren't that good considering it's very hard to figure out what the manual says because it's translated from Chinese to English in a way that the language is very complicated and not fluent.
Also the video and sound quality is horrible, you can barely hear or see anything.
The memory (This is not in all cases since some take external memory cards) is fake, which means that it will be written as 16GB but if you reformat the partition you will see that it's 256MB , which makes the device not reliable at all since the data will get corrupted after writing more then 256MB of video.
Furthermore, there are a lot of faulty ones and out of 100 only 10 would work properly for a few months.
I suggest that you get a regular digital camera and place it in an object with a hole in it so that it records, or you can use your PC-s webcam (But you have to leave it running) to record the video without any notice using
this software.
