... -4C-3aThe typical model appliesvideo , control, power ; three-in-oneOperation voltageVideo 8V, Control12V, Power 15~270VNormal discharging current ... supply voltage. When it needs installation please according diagram to install. One of power supply line, “L ~” is firewire ... signal connections: The input end is connected with the signal channel, output end is connected to the video camera, connectors ...