Question about Laxihub MiniCam

I don't have any information about the power supply for this camera? does it have a battery? if so, how long standby and how long recording time? i would like to see the recordings directly on my mobile phone (wifi) and save them there even if the camera were stolen by a thief. does this require a subscription or is this function available at no extra cost? Is the camera also compatible with NAS systems (QNAP, etc.) so that I can also save the pictures on my NAS? Thank you in advance for your input.