Plarail SL Asoboy This is a limited edition product sold at events like Plarail Expo and official shops. The couplers between the first car (locomotive) and the second car (coal tender) are fixed. The item has been tested with batteries and confirmed to work, but it runs slowly even with new batteries, so I believe the motor is worn. This is a used item that a child has played with, so please understand this before purchasing.