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, the adjustment is complete. 2. Versatile Use: Designed for multiple adjustments, this bicycle calibrator helps align handlebars, saddles, and other components to help optimize bike performance. 3. Durable Construction: Made to withstand regular use, this bicycle handlebar saddle calibration tool offers reliable performance for maintaining alignment over time. 4. Effortless Setup: Eliminate guesswork when aligning saddles and handlebars by eye; this positioner simplifies the process 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 above package content is included; other items are not part of the sale. Note: Lighting and display differences may cause slight variations in color between the image and the actual item. Measurement may vary by +/- 1-3 cm.