The O.Pen Vape 2.0 Variable Voltage Battery is a sleek and subtle vaping pen. The O.Pen Vape 2.0 Variable Voltage Battery has four voltage settings, providing the user with full control over their vaporizing experience. The lowest voltage setting provides users with a mild experience and the highest voltage setting provides users with an intense experience that can be likened to a dab. The O.penVAPE 2.0 Variable Voltage Battery is equipped with a rapid charge USB. To activate Rapid Charge Mode, simply swipe your finger across the logo on the charger and the light will change from orange to red once in Rapid Charge Mode. When fully charged, the light on the USB and battery will be green.