The Key B+M slot is 6mm height and can't fit in laptop M-key slot.
PCBA dimension: 22*110mm, Main control chipset: JMB582
Supoort SATA Key B+M SSD with 2230/2242/2260/2280.
Applicable slot: Key B+M SSD to M-Key Host.
It has Key B+M interfaces, which can be connected to an SSD, and supports desktop motherboard PCI-E NVME M-key port.