Ebay item no - 301266335436
Had mine a few years and been spot on
Ideally used on cars in long term storage thats why i originally got it for my previous escort Rs turbo and Focus Rs that were off road from oct-April but its also ideal to give tge golf a good top up once a month over the winter, all automated, just plug it in and light goes green when fully regenerated etc
I leave car unlocked and sat nav disc out also otherwise charger may never click off due to a constant small drain from alarm etc