1. Ultra thin design, simple installation, compact design and delicate appearance. Support safe software and hardware on/off, compatible with for raspberry pie 4B 8GB/4GB/2GB/1GB 2. The storage expansion board X823 supports UASP. processing, surface , no rust. Aluminum alloy material is conducive to heat dissipation of the shell. 3. The built-in PWM fan can dynamically adjust the fan speed according to the CPU temperature. A spare acrylic front panel to help WiFi signals. 4. A 2.5-inch SATA hard disk bit is built in (the hard disk thickness does not 10mm; the package sold does not include 2.5-inch SSD hard disk and for raspberry pie motherboard) 5. All 4 interfaces of for raspberry pie are adjusted to the back through the X-C1 adapter board, so that all interfaces of for raspberry pie can be easily accessed. Product overview: NASPi provides a quick and easy way to create your home media and network assisted storage (NAS) for your raspberry pie 4. The USB 3.0 port provides an ultra fast data fer rate of up to 5Gbps, allowing you to fer amounts of data in seconds. The built-in LED indicates the read or write status - no more guessing. It supports booting the from your HDD/SSD to application opening, Web services, and file copying, as as UASP. Name: NASPi Interface: --compatible * 2 Fan: 4010 PWM fan (supporting speed regulation) Connecting : 7 Pin (used for safety switch, PWM fan control, etc.) Shutdown: Supported Script requirements: installation script is required Power supply: 5Vdc+/- 5%, 4A (powered through Type-C port of X-C1 adapter board) Product size: 121 x 90.5 x 45mm color:Black Material:PCB+metal Package Contents: 1 x NASPi aluminum alloy shell 1 x X-C1 V2.0 adapter board 1 x PWM fan with bracket (supporting speed regulation) 1 x X823 V1.5 expansion board 1 x 7-Pin GPIO interface cable Only the above package content, other are not included. Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.