The one I got is a slightly different model but similar. It was hard to believe it could really do what was claimed, but I tried it out and was surprised to find it did. E.g. started the wife's car. It holds charge for at least a month - I top it up (a few hours on a USB lead) only occasionally. Incidentally can also be used as a light, or to charge a phone if you are stuck. Worth carrying with you, especially if you have doubts about the battery on your car or bike.
I am sure mike bought wire from Halfords that would be used for battery terminals, and matched to the connectors that were supplied with the jump starter. Also pretty sure we started his ol 2.5 T4 VW with it once.