Features:

•    Top cap with air control ring
•    Spring loaded button is at the bottom of mod
•    Bottom locking ring
•    510 threading connector
•    Compatible with any device with 510 threaded connector
•    with extension tube
•    Can be powered by 1 x 18350 battery / 1 x 18490/18500 battery / 1 x 18650 battery (batteries sold separately)

Note: please DO NOT stack batteries as this is a mechanical mod with no circuitry, you will effectively double your voltage which can and will destroy attached devices.