With all the other high-end mice I've seen, I'd half-expected Logitech's latest gaming model to have a bunch of extra keys as well, but that's not the case.
Instead, when making the G100s Optical Gaming Mouse, while the company did implement an optical sensor with “delta zero sensor technology” (switchable 250-2500dpi resolution), it only gave it 4 buttons.
This is also not one of those wireless peripherals. Instead, the link to a PC is established via a USB 2.0 cable.
The Swiss peripheral maker should start selling the mouse soon, for the price of $35. That means €26, give or take, but knowing how rarely exchange rates matter in such things, the EU tag will probably be closer to €35.
Then again, Logitech is, itself, a European company, so it might manage to push the tag lower since shipments and import taxes will be fewer.