W&H WE-99 LED Electric handpieces are very similar to the W&H WA-99 with the exception of the incorporation of super bright LED light in place of the cellular fiber optic rods. We still prefer the cellular optic rods to LED for longevity. However, LED light modules can be replaced in these.
Same super strong chuck that W&H is known for, and large bearings which seem to hold up better under heavy lateral pressure. W&H has resisted the temptation to reduce head size, such that require much smaller bearings in front, and reduce the amount of space in head for heat dissipation. Many have gone down the miniature head path, just to find frustrated doctors returning to their trusted standard head handpieces.