iPV ReFi Pod System is an ultracompact, all-in one device with a built-in 400mAh battery and 2ml capacity pod with 1.2-ohm resistance. The iPV ReFi has input and output voltage of 3.2v to 4.2v with a max input current of 4A. The pod has a ceramic core for long life and maximum flavor, while the front of the device features an LED indicator. Safety features on the iPV ReFi Pod System include under voltage lockout protection, over-temperature protection, and short circuit protection. The ReFi measures 88mm tall, 29.1mm wide, and 16.6mm deep while weighing 38.5 grams. It's a fantastic, portable device that's great for all-day vaping on the go!