The Vapeman Botany Mod is a discreet mod for use with several sizes of pen style cartridge. It utilizes a 650mAh built-in battery with variable Voltages of 2.7, 3.1 and 3.5. Each voltage is indicated by 3 ascending lights in the colors Red,vaporesso aurora play Blue and Green respectively. The cartridge connects to the mod by attaching a 510 threaded “cap” over the cartridge-510 pin. The cartridge with cap are then both secured to the mod by a recessed magnet within the mod. The package comes with the Botany, 510 cap and USB charging cable. Clicking the power button five times turns the mod on/off. Three times for preheat and once to change voltage. A light indicating voltage glows when you “rustle” the mod ie when you move it. Nicer than having to “fire” the mod in order to find out where you are at. The viewing window is huge and allows you to see all of the cartridge and it’s contents…or lack thereof