Barrington watch winder single shadow midnight blue measures just 11cm x 11cm x 15cm can be operated either by ac mains or two aa batteries barrington jump feature allows multiple winders to be connected together via connecting cable supplied and powered from one ac power source ultra quiet japanese motor multiple rotation settings clockwise counterclockwise or alternating multiple turns per day tpd settings from 650 750 850 1 000 or 1 950 to suit any weight of watch adjustable