Shimano EW-EC300 Charging Cable Staying Charged Electronic drivetrains have revolutionized the way many riders ride their bikes. The only problem is they require a recharge every now and then. The Shimano EW-EC300 Charging Cable is designed to work with the new Shimano 12-speed Di2 drivetrains. It works with the Dura-Ace R9200 and the Ultegra R8100 powermeter cranks as well. It is 1700mm in length. Features Designed for the new Shimano 12-speed Di2 drivetrains Recharges the Dura-Ace 9200 powermeter cranks as well as the Ultegra R8100 cranks Cable length: 1700mm | Shimano | Ew-Ec300 Charging Cable 1700Mm