This is an M1HE. Used for one week. I'm selling it because the keyboard was too big for my desk. Aluminum alloy bottom case Gasket mount structure AP, RP compatible Magnetic switch and mechanical switch compatible The default key switches are magnetic switches, so it supports rapid trigger. Unlike other keyboards, it also supports mechanical key switches. The typing sound is on the higher side. To prevent swapping, returns are not accepted. Please read the product description before purchasing.