Type-C Charging Convenience: Convert your for 4-pin charging interface to Type-C, enabling universal compatibility with modern Type-C cables, power , or laptops for on-the-go charging. Emergency Power Supply: Use any Type-C power source (e.g., phone charger, portable battery) to charge your DI2 electronic transmission system during rides, ensuring no downtime. Perfect Compatibility: Designed for 12-speed EW-EC300 and DI2 systems (R9200/R8100/R7100 series), seamlessly integrates with official accessories. Compact & Portable: Ultra-small design (0.4inch/10mm connector) 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. Colour:Black Material:Plastic Package Contents: 1 x Portable Di2 Charger Adapter(The words on the product due to different product batches, but it not affect the use) 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.