Features: [Sound Guide Rail]: Wear resistant and comfortable, transmits information data to the meter. [Sliding Clips]: The dial can be held in place for measurement; removable jaws can be adjusted to suit various dial sizes. [Indicator Light]: Equipped with a red indicator light that illuminates and flashes when powered on. [Data Transfer Terminal]: Uploads data to a computer; highly accurate and easy to use. Ready to use when connected to a computer. Compatible with tablets, laptops, and desktop computers with compatible systems. [Multi-functional Design]: Supports signal value, daily rate, polarization, oscillation, frequency, and watch tone waveform display; supports frequency setting and angle adjustment. This calibrator is an instrument used to calibrate mechanical watches. It measures the time accuracy and error of a mechanical watch and performs calibration to improve the accuracy and stability of the mechanical watch. It is one of the essential tools for watchmakers, watch repairers, and watch collectors. Material: Plastic Color: Grey Package Contents: 1 x Watch Calibrator 1 x Data Cable Note: Light reflection and different displays may cause the color of the item in the picture to appear slightly different from the actual item. Measurement error allowance is +/- 1-3 cm.