You are
fortunate to have the DSE905 V
3, which does
not have a bottom on/off switch (V1 and V2 had serious problems, one of which was humorously documented at the end of GrimmGreen's review).
V3 works pretty well (at least with the default DSE901 atomizer; I've have mixed success when using it with adapters for the 801 and 510). That bottom switch on the V1 and V2
sounds like a good idea, but caused unwanted activation when carried in a pocket or purse. And my (and your) V3 stands upright on the desk!
I don't know why you received the instruction manual for an earlier version. Tell your supplier to get his act together.
