This is about the Raspberry Pi 4B

Specifications table

parameter	value
release date	2019-06-24
pricing	typically starting from 35,95 €
operating systems	Raspbian (Buster), LibreELEC based on Kodi, ...
input voltage	USB-C/GPIO/PoE : 5.0~5.1 V
input current	USB-C/GPIO/PoE : idle: 1.0 A min. load: 2.0 A w/o peripherals, up to 3.0 A in sum
CPU	1.5 GHz 64-bit quad-core ARM Cortex-A72 CPU (ARM v8, BCM2837)
RAM	versions with 1GB, 2GB, 4GB (LPDDR4) and a new 2020 version with 8GB
network	1 GBit LAN, WiFi dual-band 802.11 b/g/n/ac (2.4 GHz, 5 GHz), Bluetooth 5.0 low-energy (BLE)
GPIO	40 pins, with new alternate mode
camera	CSI camera port
displays (hw/accel)	DSI, HDMI 0, HDMI 1, VGA (via GPIO alternate mode)
displays (software)	SPI (slow, some LCDs and e-ink displays), USB (active converter)
video codecs hw/accel	H.264 (1080p60 decode, 1080p30 encode, via GPU), HEVC: H.265 (4Kp60, access via CPU)
known video codecs, unsupported by hw/accel	MPEG-2, MPEG-4 (discontinued), VP9, AV1 (maybe next generation of Raspberry Pi?)
3D hw/accel	OpenGL ES, 3.0 graphics
PCI Express	Yes, 1 Lane, hidden under the USB 3.0 chip
GPU / Freq.	VideoCore VI / 500 MHz
VideoCore architecture	derived from a vc5, the actual V3D block is upgraded to vc6
VideoCore Texture Size Limit	7680x7680

Special Features

• power conservation

  sudo halt will shut down and wait for pin GLOBAL_EN to be shortened to GND, after that the Pi 4B will reboot. Power draw is only around 20mA during this halt state

• digital video output

  Configuration details in /boot/config.txt
  sample config for two monitors:
  
# CEA 640x480 @ 60fps, 4:3
[HDMI:0]
hdmi_group=1
hdmi_mode=1
# DMT 640x480 @ 60fps, 4:3
[HDMI:1]
hdmi_group=2
hdmi_mode=4
  
  - or you may try -
  
# DMT 1360x768 @ 60fps, 16:9
[HDMI:1]
hdmi_group=2
hdmi_mode=39
  

• analog video output

  is disabled by default so the clock isn't used, therefore the system runs a bit faster. It is possible to force the TV-out output clock to work by adding "enable_tvout=1" to /boot/config.txt

Installation

(since 2019-07-10)
do it on your own risk

• download operating system image

  Download microSD card image from https://www.raspberry.org/downloads/raspbian/
  

• copy to micro SD card to boot the Raspberry Pi 4B

  under Linux, use gunzip
  
  this is just an example, filenames could differ in your case:
  gunzip -c raspbian-buster-20190710-desktop-normal-pi4comp.dat.zip | dd bs=1M status=progress of=/dev/sd<x>