Yamaha speedo / fuel consumption gauge for Command Link engines. This is the latest round type - part number 6Y8-83500-20-00.
eBay link for same gauge https://www.ebay.co.uk/itm/Yamaha-Ma...0988941456d9ea
Plugs straight into command link hub, includes a Command Link network hub, power lead and jumper lead.
£100 - these are £340 from Yamaha for the gauge alone, plus the hub and leads.