lllegal Co Kloud 510 makes sure you carry your cartridge safe and discreet. 510 Threaded Battery. Easy To Carry. Pocket Sized. Threaded Magnetic Lid That Ensures An Easy Pull. Pre-Heat Mode. Variable Voltage. 650mAh Battery. Output Voltage: 3.0V/3.4V/3.8V Battery Capacity:650 mAH Size: 76x40x16 Tank Volume: 1 g cartridge Kloud 510 is an easy to carry Pocket size Thread Magnetic lid that ensures easy pull.