Materials: Release Speed ​​Limit Cable Size: 35km/h Color:BLACK 1. Designed specifically for Ninebot ZT3 PRO E/PRO D German versions, precisely matching the original vehicle interface, easy installation without modification. 2. Effectively removes the vehicle's factory speed limit, increasing the maximum speed to 35km/h for a more powerful riding experience. 3. Employs a high-performance stable chip for smooth signal transmission, ensuring a safe and reliable unlocking process without damaging the circuitry. 4. Supports firmware upgrades and system compatibility optimization, adapting to German firmware requirements for more stable operation after unlocking. 5. Plug-and-play design, non-destructive installation, retains original factory functions, and allows for flexible and free switching of riding modes. Package includes:1Pcs Unlocking Speed Cable for Ninebot By Segway ZT3 PRO E