EC21 Product Catalogs - p-3304 http://www.ec21.com/ec-market/p-3304.html Digital Video Recording & Monitoring System (P-3304S)http://pentaone.en.ec21.com/Digital_Video_Recording_Monitoring_System--183089_183090.html Perfect system reliability Easy to use like Time Lapse VCR Fully replaces Time Lapse VCR and color quad splitter Works20031014