What does it mean when the Mevol X Device vibrates during vaping?

The Mevol X comes with an Immersive Haptic Engine which is driven by the world's smallest linear motor with an ultra-long lifecycle of 150 million cycles. It provides you with an interactive experience, issuing a micro-shock while the device is in use, offering a moderate vibration frequency for a more delicate puff experience.

There are two modes: continuous vibration and no vibration. To switch between the two modes, remove and insert the pod twice within 1 second, the LED will light up and the device will vibrate once to indicate successful switching.