This is a multi-function mechanical watch timegrapher, it has multi-function such as rate deviation, amplitude and polarization calibration. This tool can be widely used in your daily watch repairs or use it at the watch repairs shop. If you are interested in this product, come and have a try, it will not let you down. Features: Portable Sizeandamp Easy to Carry: This mechanical watch timegrapher has portable size and you can put it into your worktable easily or carry it with you to share with your friends and families. Large Display Screen: This mechanical watch timegrapher has a large display screen for you to see the data more clearly, give you a better using experience. Mulit-function Tool: This tool can test rate deviation, amplitude, polarization, lift angle, cycle for you. Easy to Operate: This mechanical watch timegrapher is easy to operate, there are six different directions can be adjust by rotating according to your needs. Preferred Material: The base is made of aluminium alloy material and has the characteristics of strong corrosion resistance. Specifications: Material: plasticsandaluminium alloy Plug: EUPlug Voltage: 100-240V Rate deviation measuring: andplusmn 999s or d Accuracy: 1.0s or d Amplitude measuring: 100anddeg -360anddeg Polarization: 0-9.9ms Measuring direction: 1-6 Package size: 235 x 210 x 195mm or 9.3 x 8.3 x 7.7in Package weight: 1200g or 2.6lb Packing list: 1 x Mechanical Watch Timegrapher with Base 1 x Plug