1 meter cable is supplied. Apart from just connecting to ancillaries,this model is particulary effective when connected to the negative binding post at the loudspeker end, therefore two units are recommended for this.
This has now been revised to the Next Generation with improved cable.
Usually the DAC, media player, preamp or integrated amp is a first connection to make.
Connect the supplied cable to the grounding device with either the spade or banana, then connect the copper laboratory clip to the chassis ( loosen off a chassis screw if preferred ) have a listen for an hour or two, then swap and clip on to a spare RCA terminal over the negative. Have another listen for around the same time and decide which is preferred. The chassis or the RCA 9 signal ground )
Repeat this process with the next ancillary, and decide which one is best.
After experimentation, one of your ancillaries prefers signal and the other ancillary prefers chassis, then you will need two separate grounding devices.
If and when connecting loudspeakers, do consult with the manufacturer first.