Usage Tips:[Important] It is strongly recommend to use 5.8G wifi instead of 2.4G wifi , according to the feedback if use the external USB device (like mouse, keyboard, display) or use X857-C3 metal case, the system maybe unstable or not boot from the SSD. Also pls format the SSD before use.X857 V2.0 mSATA adapter only design for 4 Model B(1GB/2GB/4GB/8GB), Supports up to 1TB mSATA interface SSD hard disk.How to RPi 4&X857 V2.0: 5Vdc +/-5%, Powered by for 4 Type-C In portMatching metal case for RPi 4&X857 V2.0&X735/X708, pls refer to X857-C3 Case, BUT note the control switch should be connect to X735/X708, there is no PWR port for external switch on X857 V2.0.colour: blackMaterial: plastic + metalPackage Contents:1 x X857 V2.0 mSATA SSD shield1 x USB3.1 jumper6 x Screw M2.5x6mm4 x Spacer M/F M2.5x7+6mm4 x Spacer F/F M2.5x9.5mmOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.