The Vapir Oxygen is Vapir's most affordable portable vaporizer. The Vapir Oxygen can work off of battery power, for those who want to vaporize on the go, or it can be plugged into the wall and operated. You may opt to purchase a Vapir Oxygen with or without a battery pack. The rechargeable batteries allow the user to enjoy up to an hour of continuous use once its fully charged. It takes about 8 to 12 hours to charge the 1500mAH battery. Other than using household electric current, the Vapir Oxygen can also be used in the car. There is a 12-volt car adapter provided to facilitate this. The Vapir Oxygen comes with a 90-day (3-month) manufacturer’s warranty.