Ovns JC02 650mAh Pod System is a compact pod system device with resin plates on both sides. Powered by a built-in 650mAh. At the top left of the device is a rounded preheating button. Sounded the button, there is a smart three-level battery life indicator to show you the different battery levels. As for refillable pod, it can hold up to 1ml of your favorite e-juice while housing a unique 1.2ohm ceramic coil.