Holding a wand that shakes like a terrified Chihuahua and subtly hums like a phone on vibrate is strange enough. Maneuvering it gingerly from lash root to tip takes some practice. Do lashes look long and full after using them? Sure. More than they would had a battery not been involved? I'm not so sure. Still, something about the vibration makes the whole enterprise feel more thorough.

The Oscillation's official release isn't till November, but the company is offering a one-day preview sale at select Lancôme counters on July 31.

Above: Lancôme's Oscillation