The Sigelei VCigo A7 and O9 Sub-Ohm Tank Starter Kit combines to make Sigelei's newest compact, light, and portable pen style devicetheir Elabo SW Sub-Ohm Tank. The Vcigo A7 has a tremendous 3000 mAh built-in battery that outputs at full power in a smart mechanical style output. The A7 measures 24.5mm in diameter and 86.5mm in length, with a Micro USB capable of charging up to 2A. Output of the A7 is done via a Smart Mechanical Style Output, which is dependent on the current state of the battery, with a range of 3.3 to 4.2V. A LED indicator allows users to see how much battery life is remaining; 100% to 60% a green light stays on, at 59% to 30% a yellow light stays on, at 29% to 10% a red light stays on, at 9% to 0% the red light will flash in frequencies. Included with the VCigo A7 is the O9 Sub-Ohm Tank, a 2ml capacity tank with an all glass top cap, utilizing the drip tip as threaded fill port. The O9 uses the SM Coil Family comes with two SM2 M2 0.2 ohm Single Coil that is rated for 70 to 90W. With its small form factor, alongside a smart mechanical style output, a protection suite, the Sigelei Vcigo A7 and O9 Sub-Ohm Tank Starter Kit is a top choice for those looking to start vaping, or for those who are experienced!