POTENTO POD KIT, a new novel design of ADVKEN, which its the biggest difference from other products is that designed with a voltage adjustable knob. This means you can adjust voltage from 3.2V to 4.2V for different nicotine E-liquid to get the most flawless flavor and effortless vapor. PARAMETERS Size: 121.2mm x 22.8mm x 12mm Net Weight: 33g Battery Capacity: 560mAh Output Voltage: 3.2V~4.2V Cartridge Material: PCTG E-liquid Capacity: 2.5ML 1. Pull out the pod of Potento Kit. 2. Pull out the rubber plug on the slot and filling E-juice through the slot. 3. Press the rubber plug back carefully and firmly. Note: After you fill the new pod, please wait 2-3 minutes to make sure the pod cotton fully soaked in time to avoid burning.