Built-in PWN Fan:Active cooling PWM fan, 30x30 mm Power Button:There is safe shutdown, reboot and forced shutdown function by installed script. Neat cable Management:All interfaces is in back size, include 2 x full size -compatible port, power port, A/V port, USB ports,Ethernet ports and power buttons Aluminum Alloy Case: lines with a strong sense of technology Replaceable Base:Support change the NVME PCIE Expansion Board Colour:Black Material:Aluminum Alloy Package Contents: 1x ONE V3 Case Only the above package content, other products are not included. Note: Light reflection 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.