Geiger Counter Graphing Software for PC with USB to 3.5 mm TTL cable for GCA-07, GCA-06 and GCA-03 series of Digital Geiger Counters and other compatible Geiger counters with a TTL serial data output GRAPH GEIGER COUNTER DATA. Compatible with Images series of Digital Geiger counters, DMAD converters, or other Geiger counters that output a +5V serial data via a 3.5 mm stereo socket, for radioactive particles detected. (Software requires Digital Geiger Counter (not included)) Serial data specification are given in product description. SOFTWARE AND USB COMPATIBLE: With PC computers and Geiger counters that output a +5V TTL serial data for radioactive particle detected. The TTL serial data must be outputted via a stereo 3.5 mm socket. Serial data specification are given in product description. GRAPHIC MODES: Software can graph Geiger Counter data in Line Chart, 3D line Chart, Bar Chart and 3D Bar Chart CD WITH DRIVERS FOR WIN7, XP and 98: DRivers allow USB to 3.5 mm TTL Serial Cable to interface between PC computer software and compatible Geiger Counter devices over USB. TIME PERIOD OPTIONS: Set software to graph and display data in optional time periods of: One Second, One Minute, One Hour