1. Precision Alignment: Effortlessly mount the bicycle handlebar saddle positioner at the center of the handlebars; when the light aligns with the tire's center, you've achieved the perfect adjustment. 2. Versatile Use: Designed for multi-purpose adjustments, this bicycle calibrator is your go-to for aligning handlebars, saddles, and more, ensuring your bike is set up for optimal performance. 3. Construction: Built to last, this bicycle handlebar saddle calibration device withstands the rigors of regular use, providing a reliable solution for maintaining your bike's alignment over time. 4. USB-C Charging: Conveniently rechargeable via a USB Type C connection, this bike handlebar saddle calibrator ensures you're for quick and easy bike adjustments without the hassle of batteries. 5. Effortless Setup: Say goodbye to the guesswork and strain of aligning saddles and handlebars by eye; this handlebar saddle positioner simplifies the process, ensuring a straight and comfortable ride every time. Size: . 11cm (4.33inch)x7.6cm (2.99inch)x5cm (1.97inch) Charging Type: Type-C Battery Type: Built-In Polymer 180mAh Colour:black Material:ABS + Silicone Package Contents: 3 * Saddle Calibrator 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.