The Eleaf iStick 20W Mod features an OLED screen that displays the battery condition, resistance, wattage and voltage. The battery has a 2200mah capacity that will last an average user the entire day. By offering up to 20W of output wattage, you can be guaranteed some of the biggest and heaviest vapor clouds possible. The adjustable voltage ranges from 3.0V to 5.5V and can be easily adjusted on the OLED screen according to your vaporizing preference. It features 510 threading and includes a eGo threading connector that works with most tanks and cartridges.