Supertron Electronics Ltd. Manufactures Standalone Digital Video Recorder with Nine Channels Real-Time Live Display. Supertron Electronics Ltd. Is an ISO 9001:2000 certified company. Standalone Digital Video Recorder with Nine Channels Real-Time Live Display has one channel audio input, triplex operating system, that is, record, playback and network at same time, USB devices firmware update and image backup. Standalone Digital Video Recorder with Nine Channels Real-Time Live Display supports two internal and external HDDs. This device enables fast and easy image search function. It has sensitive motion detection and provides transformation software for viewing by PC windows media player.