The Raspberry Pi 4 Model B is a powerful, compact, single-board computer designed for various applications, from DIY projects to educational purposes. Some of its key features include:

• Processor: Quad-core Cortex-A72 (ARM v8) 64-bit SoC running at 1.5 GHz.

• Memory: Available in 2GB, 4GB, or 8GB LPDDR4-3200 SDRAM.

• USB Ports: Two USB 3.0 ports and two USB 2.0 ports.

• Ethernet: Gigabit Ethernet for high-speed internet connection.

• Wireless Connectivity: Built-in 802.11ac Wi-Fi and Bluetooth 5.0.

• Display Output: Two micro-HDMI ports supporting up to two 4K displays.

• Storage: MicroSD card slot for operating system and storage.

• Power: USB-C power input (5V/3A).

• Video and Audio: 4K video playback, with support for dual-display and audio via HDMI.

The Raspberry Pi 4 is suitable for tasks like home automation, media centers, programming, and more advanced computing needs, while retaining its affordability and versatility.