How to: Tools to write the Operating System (OS) image to your boot media(microSD card)
[Raspberry Pi Imager](https://www.raspberrypi.org/software/) is the quick and easy way to install Raspberry Pi OS and other operating systems to a microSD card, ready to use with your Raspberry Pi.
#### Hardware

[Raspberry Pi Router Board for CM4 module (Cost: $55 USD)](https://www.seeedstudio.com/CM4-Router-Board-p-5211.html) is an expansion board based on the Raspberry Pi Compute Module 4. It brings Raspberry Pi CM4 two full-speed gigabit network ports and offers better performance, lower CPU usage, and higher stability for a long time work compared with a USB network card. It's compatible with [Raspberry Pi OS](https://www.raspberrypi.com/software/operating-systems/), [Ubuntu Server](https://ubuntu.com/download/raspberry-pi) and other Raspberry Pi systems.
Raspberry Pi Router Board for CM4 module
**Technical Specs:**

 * Compatible Module: Raspberry Pi Compute Module 4 series.
 * BCM2711 4 core @ 1.5GHz Cortex-A72.
 * Support standard Raspberry Pi HAT interface.
 * Support POE HAT to supply power to the board.
 * Support POE HAT for external power supply.
 * Full-speed dual gigabit network interface.
 * Master-slave dual USB2.0 interface.
 * Micro SD card slot, used to support non-eMMC version of CM4.
 * Standard HDMI video output interface.
 * 0.91 inch IIC OLED display.
 * 5V DC fan interface(Support controlling via PWM signal).
 * Ethernet: high-performance Gigabit ethernet controller RTL8111E chip, JXD 2111x G2406s chip as isolation transformer.
   * Port0: Compute Module 4 Built-In.
   * Port1: PCI Express 1000BASE-T NIC.
 * GPIO: 40-Pin GPIO compatible with Raspberry Pi.