This is an unusual one from Wismec. It can be used as a 21700 single battery squonker or you can remove the squonk bottle and convert it to a dual battery box mod. It also has a user-replaceable control board that switches it from a VV mod to an unregulated mod (as best I can determine from their product info). You can even replace the 510.
What I'm really curious about is the replaceable control board. There must be some sort of harness in the mod to avoid having to solder connections.
Few pics from the Wismec site are below. Lots more, along with some limited info, on their site at: LUXOTIC MF BOX - Wismec Electronics Co.,Ltd
What I'm really curious about is the replaceable control board. There must be some sort of harness in the mod to avoid having to solder connections.
Few pics from the Wismec site are below. Lots more, along with some limited info, on their site at: LUXOTIC MF BOX - Wismec Electronics Co.,Ltd