Obviously no one expects that women will stop dressing up in heels altogether, but if you limit the amount of wear time and the heel's height you're, um, taking a step in the right direction.

Some of the women choose to wear pinhole glasses to limit the UV rays getting to their eyes and causing permanent damage.

When the wear of the carbon brush reaches to the limit, the wear limit alarm device can timely remind the user of replacing the carbon brush, so the non-normal damage of the machine is avoided.