ScalextricDigital C8515 Plug for Digital Plug Ready (DPR) Saloon cars 1:32 Scale Accessory

I'm considering buying the Scalextric Fast and Furious Race Car Set for my 7 yr old and it points out the need for this item for digital racing. Could somebody please help me understand the difference in outcome whether I choose (or not choose) to upgrade by purchasing this plug? Also, do I need to buy two units, I s…

Will this plug in work with a Carrera digital setup?

I'd like to joing a digital scalextric speedway c1388t and a mclaren one. will this digital plug work on scalextric arcair mc laren cars? thanks!

Does anyone know if the recent versions (i.e. 2019) are rev. H ? Rev. H has the separate solder pads for the front and rear lights.