•Four channel video signals input •Two channel video signals output •Many mode display, such as full / quad / PIP / zoom / auto •Picture frozen function •Built-in buzzer alarm function •Built-in timer •Playback function •OSD program menu •Auto video loss detection •CCIR / EIA system •Power supply: DC 12-15V 300mA •Power consumption: 2.5W •Weight: 1.2kg •Operation temperature: 0-45°C