What M.2 slots are available on the PRIME B660-PLUS D4 and what are their specifications?

The board has three M.2 slots (Key M): M.2_1 supports type 2242/2260/2280 and PCIe 4.0 x4 mode via 12th Gen Intel processors. M.2_2 supports type 2242/2260/2280/22110 and PCIe 4.0 x4 mode via the B660 chipset, and M.2_3 supports type 2242/2260/2280 and PCIe 4.0 x2 mode via the chipset. There is also a Key E M.2 slot for installing an optional Wi-Fi module (sold separately).