Harper XSILENCE Manuel De L'utilisation page 17

INSTRUCTION FOR USE
1. Before using the appliance, unwind the cable and insert the plug in to the
power socket. The YELLOW mark on the power cable shows the ideal cable
length. Do not extend the cable beyond the RED mark. To rewind the power
cable, press the rewind button (I) with one hand, and guide the cable with the
other hand to avoid wrapping.
2.Press the ON/OFF button to switch the appliance.