The Raspberry Pi 4 Model B is the best performing single-board computer to date from the Raspberry Pi Foundation that has undergone a huge upgrade in comparison to all previous models. For the first time, the Pi 4 B is available in different memory versions up to 8GB with true Gigabit Ethernet, USB-C power, USB 3.0, dual 4k display output and a quad-core CPU to rival the performance of an entry-level desktop PC. It’s a truly powerful and capable computer in a small, affordable package.

● The Raspberry Pi 4 has received a performance boost to 1.5GHz with an upgraded quad-core processor.
● There is now a choice of memory size; 4GB and 8GB to enable more complicated processes to run efficiently.
● Dual micro-HDMI ports enables a dual screen set-up - previous versions featured 1 standard HDMI port.
● Up to 4K resolution video decoding.
● 2 x USB 3.0 ports enable faster connectivity to other peripherals – previous models has 4 USB 2.0 ports.
● Bluetooth 5.0 and WiFi - an improvement on the previous Bluetooth 4.2 on the Pi 3 B+
● True Gigabit Ethernet as the Pi 4 is not limited by the USB 2.0 bridge
● Power is supplied via USB-C – Raspberry Pi 3 was powered via micro-USB at 5.1v

A Raspberry Pi is a compact computer board offering endless opportunities. From the beginning, the Raspberry Pi was designed to be simple to use and simple to adapt to what you want to do with it.
Simply plug into a TV or monitor, keyboard, mouse and power supply, and you are ready to go. The great thing about Raspberry Pi is that it is suitable for almost all age groups. Whether it’s introducing programming to children, or used by engineers to make complex computer-controlled systems, anyone can use one.
There is a huge range of "HATs" (Hardware Attached on-Top) and other accessories which you can connect to the Raspberry Pi and add specific features such as:

There are 3 Raspberry Pi 4 versions with different memory capacity available:

Processor: Broadcom BCM2711 Processor Quad core A72 (ARM v8) 64-bit SoC
Memory (depending on model): 2GB LPDDR4 SDRAM, 4GB LPDDR4 SDRAM or 8GB LPDDR4 SDRAM
Bluetooth: Bluetooth 5.0
WiFi: 2.4GHz/5.0GHz IEEE 802.11ac
Ethernet: Gigabit Ethernet
USB: 2 x USB 2.0 ports, 2 x USB 3.0 ports
Connection: 40-pin GPIO Header
HDMI: 2 x micro HDMI ports (up to 4Kp60 supported)
Video: 2-lane MIPI DSI display port, 2-lane MIPI CSI camera port
Audio: 4 Pole stereo output and composite video port
Multimedia: H.265 (4Kp60 decode), H.264 (1080p60 decode, 1080p30 encode. OpenGL ES 3.0 graphics.
Storage: microSD card slot for loading operating system and data storage
Input power: 5v DC via USB-C Connector (min 3A), 5v DC via GPIO header. POE enabled (PoE HAT required)
Operating Temperature: 0 to 50°C

When we say that Raspberry Pi offers endless opportunities, we mean it. To help spark your ideas and get your project going, here are some suggestions to look at to bring the capabilities of Raspberry Pi to life:
• Learn to Programme - Raspberry Pi is a great tool to learn how to program and there are tonnes of resources available on the Pi Foundation website and other communities to help you.
• Teach to Programme - Raspberry Pi is used in schools all over the country, inspiring the engineers of tomorrow.
• Media Centre - play and stream TV channels and music.
• Wildlife Monitoring - Keep track of the wildlife in your garden, both day and night with the addition of the original or PINOIR camera modules.
• Retro Games Console - recreate your favourite games from your childhood, complete with a retro style joystick.
• Home Automation - enter the generation of the Internet of Things by setting up automated lighting, appliances or temperature control systems throughout your home.
• Lighting Show - impress your neighbours with a spectacular lighting show controlled your Raspberry Pi board.
• Industrial - use the Raspberry Pi to monitor areas of production, automate timely processes or even use for quality control.
For examples of projects and a community of people to help you get started, head over to DesignSpark (https://www.rs-online.com/designspark)