Model: Precision calibrator Measuring range: Watch Specification: Calibration meter (grey) Series: Precision calibrator Type: TOOLS Item Type: Repair Tools & Kits high-precision calibration instrument specially designed for amateur users Professional design! Compared with similar products, its performance accuracy is better, featuring anti-magnetization Excellent hardware design and analysis software Can measure day difference, polarization, amplitude, frequency, dotted line, waveform graph and rise angle settings Rugged and reliable housing made of hard plastic The interior is composed of circuits, which not cause magnetization Connect by a type-c data cable Connect to mobile phones and computer to measure (for Android phones, tablets, laptops and desktop computers) Small and portable easy to carry Colour:grey Material:Plastic+Iron Package Contents: 1 * meter calibrator 1 * usb cable 1 * installation bag 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.