Optimize your watch performance with the NO.1900 Professional Timekeeper, an essential tool for watch enthusiasts and professionals alike. This precision instrument features a compact case size of 185mm x 95mm x 130mm, making it easy to incorporate into your workshop or home setup. With a visible testing area of 95mm x 54mm, you can assess various critical parameters effortlessly. The NO.1900 offers comprehensive testing capabilities including daily difference, pendulum, polarization, beat, rise angle, and period measurements. It reliably measures daily differences up to +999s/d with an impressive accuracy of 0.1s/d, ensuring your timepieces maintain optimal functionality. The pendulum amplitude measurement ranges from 100° to 360°, providing detailed insights into your watch's performance. For those looking to enhance their watch calibration process, the NO.1900 features a polarization measurement of 0 to 9.9ms and six measurement orientations, allowing for precise adjustments. With a line length of 196 points, you can achieve meticulous evaluations that elevate your watch maintenance game. Constructed from durable materials like zinc alloy and aluminum, the included microphone is designed for longevity and reliability. Weighing 568g, it is robust yet manageable for daily use. The power adapter, compatible with voltages from 100V to 240V, ensures you can use this device anywhere, while the 1.5m cable length adds convenience. Included in the package are the main unit, microphone, power adapter, and an instruction manual, providing everything you need to get started right away. Ideal for watchmakers, collectors, and anyone passionate about horology, the NO.1900 Professional Timekeeper is your go-to solution for maintaining the precision and performance of your timepieces.