Hublot ROTOR ENGINE Manual De Instrucciones página 15

INTRODUCTION
Your Hublot watch has an automatic winding system. This term means
that your watch automatically replenishes energy when you wear it on your
wrist using the movements of your arm. In principle, Hublot watches have a
42-hour power reserve, with the exception of a few models such as the
Unico, a manufacture movement with a 72-hour power reserve.
The purpose of the Rotor Engine is to ensure the continuous operation of
your watch when you do not wear it using a winding technique that replaces
the movements of your arm. This system allows your Hublot timepiece to
keep the exact time, the exact date, the right moon phase, etc., without any
worry that it will stop.
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