At one end of the power supply, there is a mains power plug and at the other there is a single 2.1mm DC plug. This power supply can be used to power a 24V Speed Dome camera. This power supply can also be used to power cameras which run long distances and have a reducer fitted to them.
Please make your cameras are the correct voltage before connecting the power supply because if you connect this 24V power supply to a 12V camera, you will blow the camera up and this will void your warranty.