The Elux Cyberover 18000 includes vibration alerts to keep you informed about the device’s status:ONE Vibration: Indicates that the battery is lower than 50%.TWO Vibrations: This signifies that the battery is below 30%.THREE Vibrations: These vibrations alert you that the e-liquid level is lower than 5%. These vibrations help you manage your vaping experience and ensure you’re always aware of your device’s status.