Got juice?
Make sure when you get it, that the mode is set to RMS (NO2). Press and hold the power button for 10 seconds and you should see the screen change. Also here's the link for a user's guide:
http://www.e-cigarette-forum.com/forum/vamo/359600-vamo-vv-vw-v2-user-manual-download.html
Not on this version.
You have to hold the - & + buttons at the same time to change from volts/watts.
Holding the + (top right) button will show the attached device ohms
Holding the - (top left) button will show the battery's current voltage.
Pressing the fire button (the big puppy) quickly five times will power on/off the mod.