Description: 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 (0.4in/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. Note: replacement, . Type C interface, with anti-lost rope, you need to bring your own Type C data cable Any charger with 5V gear can be , and some mobile phones with reverse output can also be Charging indicator: After charging, the blue light turn on, and the light turn off when it is fully Please check as much as possible to make sure the item is what you need. Tips: The product may be updated constantly, Due to Different Batches, The Actual Product May Have Slight Differences Or Color Differences, Which Does Not Affect Use Color: Black Material: plastic Package Contents: 1 x Type-C Adapter Battery Charger Head 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.