The 4823 allows you to simultaneously monitor more channels for those applications with more complex signal interactions but has a common ground reference rather than floating inputs and does not feature PicoBNC+ connections. This kit adds a range of BNC accessories to the 4823 providing a level of capability similar to the Advanced kit but with additional leads, adaptors and a third current clamp so you can make full use of all 8 channels. The kit is supplied in a carry case with foam cutouts.