What they actually do: several separate liquid reservoirs share one battery and mouthpiece, with a switch to choose which one you draw from. They do not mix — going from mango to mint gives you mint, with maybe one transitional puff.
The trade-off nobody prints on the box: the device is physically bigger, you will genuinely use two or three of the four flavours rather than all of them, and the one you love empties first.
EU warehouse, 2–5 days. DPD €5.00 or a Packeta pickup point €1.00, free over €50, paid on delivery.