easy to solve Sewer / Sewer

drain lid.
Many people might have suffered from overflowing of a drain due to the hair etc.
In this case, we would like to propose how to bore a hole easily without dirtying their hand.
The performance properties of this products is to remove foreign substance by the rotation of knife which is affixed at the bottom of the drain lid when they put their feet up on the drain lid.
Vibration energy known as 'being discharged energy', get the electrical energy by vibration. When one adult takes one step, around 60W impact energy is generated.