There are no buttons, the camera must be connected to the phone to work and trying to connect the camera to the phone hooking up was like I tried to slow down the code from NASA it was just impossible I spent 3 hours the guide is useless some videos on the internet are useless too. So I sent it back and will no longer deal with such cameras. I have ordered miniature computer boards (raspberry pi) with "real wi-fi" and cameras, I will make my own from good electronics.
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