... RS485, mouse, USB, 4CH Full D1 Digital Video Recorder Real-time DVR FeaturesWith H.264 High efficiency Video CompressionSupport 4CH playback ... Network server, support IE review and CMS(can manager over 500 units DVR)With Chinese, Russian, English, Italian, Portuguese, Spanish, …….. ... Pressure86kpa--106kpaDimension310mm x 220mm x 45mm(W*D*H)Weight3.5kg 4CH Full D1 Digital Video Recorder Real-time DVR