Just ordered s few of these from slowtech; supposed to be used on mech mods, its the top controll part which srews on the battery body, to make a mech mod VV/VW and controllable. Thought it a good idea as I got some mech mods from slowtech that I'm not keen on using as straight mech mods (made a mistake ordering). Thought about getting some Sigelei kicks to use on the mechs, but thought this would be one step better if I don't want a straight mech mod, but more a VV/VW mod. Anybody seen or know anything about these things? Thanks......