IGO 650 Kit contains 2 650 mAh, 2 MBCC tanks, 1 usb charger, and 1 wall adapter. 650 mAh batteries are lithium ion with automatic shut-off feature to prevent overcharging. MBCC tank is a bottom coil, bottom fed clearomizer with 1.6 mL capacity. The single coil burners are replaceable and typically last 2-3 weeks depending on usage. Available in Black, Red, White, Chrome, Blue, Purple, Yellow, or Green.