1. Precision Alignment: Easily mount the bicycle handlebar saddle positioner at the center of the handlebars; when the light aligns with the tire's center, proper adjustment is achieved. 2. Versatile Use: Designed for multiple adjustments, this bicycle calibrator helps align handlebars, saddles, and other components to help maintain optimal bike setup. 3. Durable Construction: Built to withstand regular use, this bicycle handlebar saddle calibration tool offers reliable performance for maintaining alignment over time. 4. Simple Setup: Eliminate guesswork when adjusting saddles and handlebars by sight; this positioner simplifies alignment for a straight and comfortable ride. Color: Black Material: Plastic Note: 3 x button batteries not included Package Contents: 1 x Bike Handlebar Calibrator Only the items listed above are included; other products are not included. Note: Lighting and display differences may cause slight color variations between the image and the actual item. Measurement may vary by +/- 1-3 cm.