Like the rest of the Grenco Science line of portable vapes, the G Pen Pro Herbal Vaporizer features a powerful battery and heating system. A fast heat up time enables you to take quick hits fast, perfect for enjoying vapor in short windows of opportunity. The smart battery has an auto-shut-off feature that turns the G Pen Pro vape off after three minutes of idleness, preserving battery power and preventing dry herb waste. The G Pro battery powers a convection heating system that delivers excellent vapor quality. When the G Pen Pro battery is fully charged, an LED light will glow green. And when it’s time for a charge, it will flash red 4 times. Grenco Science designed the G Pen Pro vape for on-the-go use, making sure that the battery life accommodates a busy lifestyle. Charge time is rapid with the G Pro Herbal vape, and the battery life is long, ensuring the unit can last through your day without requiring a charge.