Port: Type-C Apply to: For 12-Speed Di2 Groupsets: for - R9200 / Ultegra R8100 / 105 R7100 Emergency Power Supply: Use any Type-C power source (e.g., phone charger, portable battery) to charge your DI2 electronic mission system during rides, ensuring no downtime. Compact & Portable: Ultra-small design for easy storage in bike bags or pockets. Ideal for travel, races, or long-distance cycling. Stable & Safe: Reinforced 4-pin interface ensures secure connection and charging stability. Built-in safeguards prevent overheating and short circuits. Color: Black Material: plastic Package Contents: 1 x Battery Charger Adapter Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.