The Waveshare 19883 is metal case with cooling fan and Waveshare CM4 POE IO Board that makes it easy to build a mini-computer with a Raspberry Pi Compute Module 4 (NOT Included).
![](https://www.waveshare.com/img/devkit/CM4-IO-POE-BOX-A/CM4-IO-POE-BOX-A-details-3.jpg)
for reference only, CM4 and antenna are NOT included.
Comparing The Expansion Boards
Rich Peripheral Connectors
Onboard Connectors Including CSI/DSI/RTC/HDMI/USB/ETH/TF Card
![](https://www.waveshare.com/img/devkit/Compute-Module-4-POE-Board/Compute-Module-4-POE-Board-details-5.jpg)
Precise Cut-Out With Clear Label
Each Cut-Out Is Completely Aligned With The Connector
![](https://www.waveshare.com/img/devkit/CM4-IO-POE-BOX-A/CM4-IO-POE-BOX-A-details-5.jpg)
Cooling Fan Included
Comes With Cooling Fan, Combined With The Airflow Vent, Better Heat Dissipation
![](https://www.waveshare.com/img/devkit/CM4-IO-POE-BOX-A/CM4-IO-POE-BOX-A-details-7.jpg)
Wall Mount Support
Wall Mount Holes On Two Sides, Handy For Mounting
![](https://www.waveshare.com/img/devkit/CM4-IO-POE-BOX-A/CM4-IO-POE-BOX-A-details-9.jpg)
Application Examples
Binocular Vision, PoE Powered Raspberry Pi Projects, Or Other Industrial Context
![](https://www.waveshare.com/img/devkit/CM4-IO-POE-BOX-A/CM4-IO-POE-BOX-A-details-11.jpg)
for reference only, display and cameras are NOT included.
Outline Dimensions
![](https://www.waveshare.com/img/devkit/CM4-IO-POE-BOX-A/CM4-IO-POE-BOX-A-details-size.jpg)