DFRobot Argon ONE M.2 Case for Raspberry Pi 4B supports M.2 SSD and full-size dual HDMI. The internally reserved M.2 interface expansion slot for M.2 module, which is then connected to the Raspberry Pi by a USB adapter, helps to maximize the true potential speeds of the Raspberry Pi. DFRobot Argon ONE M.2 Case for Raspberry Pi 4B can be booted via an M.2 SATA SSD for faster boot times and larger storage capacity.