Q: What size does the connector plug of the power supply?
Outdoor cameras have a 2.1mm In / 5.5mm Out barrel connector. 2A at 12V is needed.
Indoor cameras have a 1.35mm In / 3.5mm Out barrel connector. It will need 1.5A at 5V.
The power supplies of the 720p series have a cable length of 1.5m and the 1080p cameras is 3m.