- Built-in G-Gauge flywheel and a professional design provide stable, precise tension screw operation for reliable derailleur adjustment. - 2-in-1 design simplifies carrying and is compatible with many electronic mainstream shifting systems. - High-precision adjustment for fine, accurate tuning that ensures smooth gear changes and dependable accuracy. - Enhances bicycle performance with a fast shifting mechanism and precise tension control for optimal performance on any terrain. - Durable, compact construction for easy transport and field use. - Wide compatibility with a range of electronic shifting systems used on modern bikes. - Use scenarios: - Install or adjust derailleurs on road and mountain bikes to achieve smooth, reliable shifting. - Tune and calibrate electronic shifting systems across mainstream brands for consistent performance. - Perform on-site maintenance or race-day adjustments to maximize shifting speed and accuracy.