SKU: 210000005873
Internal Battery Master Unit for your Shimano Di2 system.SPECIFICATIONSFor: Internal FramesBattery Type: Li-IonVoltage: 7.4vCapacity: 0.5AhCapacity: 3.7WhRequired Charger: Shimano SM-BCR2 Di2 ChargerWeight: 50g (-/+ 1%)