USB shield – usb host shield
if you will not use External Power please be sure this jumpers are soldered as below :

so after soldering it will be like this image

TT Motor with plastic gear and wheel 1 × 35SAR
L293 Motor Shield for arduino 1 × 46SAR
HDMI to VGA Converter Cable 1 × 29SAR
Small Stepper Motor With ULN2003 Module 1 × 41SAR
power supply adapter for raspberry pi-3 5V-2.5A 1 × 39SAR
MG995 Servo Motor 13Kg.Cm Torque 120° 1 × 43SAR
4-wheel Robot Smart Car Chassis Kit 1 × 92SAR
Module TB6600 4.5A CNC Single-Axis Stepper driver 1 × 104SAR
Case for Raspberry pi 4 Red and White 1 × 46SAR
LCD 7″ inch for Raspberry pi HDMI Touch Screen 1 × 344SAR
PCB Board 5*7 1 × 15SAR
HT12D IC Decoder for 433MHZ RF wireless module 1 × 10SAR
USB RFID Card Reader compatible with raspberry pi and windows 1 × 87SAR
Adapter 9v 2A for Arduino 1 × 29SARSubtotal: 960SAR
TT Motor with plastic gear and wheel 1 × 35SAR
L293 Motor Shield for arduino 1 × 46SAR
HDMI to VGA Converter Cable 1 × 29SAR
Small Stepper Motor With ULN2003 Module 1 × 41SAR
power supply adapter for raspberry pi-3 5V-2.5A 1 × 39SAR
MG995 Servo Motor 13Kg.Cm Torque 120° 1 × 43SAR
4-wheel Robot Smart Car Chassis Kit 1 × 92SAR
Module TB6600 4.5A CNC Single-Axis Stepper driver 1 × 104SAR
Case for Raspberry pi 4 Red and White 1 × 46SAR
LCD 7″ inch for Raspberry pi HDMI Touch Screen 1 × 344SAR
PCB Board 5*7 1 × 15SAR
HT12D IC Decoder for 433MHZ RF wireless module 1 × 10SAR
USB RFID Card Reader compatible with raspberry pi and windows 1 × 87SAR
Adapter 9v 2A for Arduino 1 × 29SARSubtotal: 960SAR
if you will not use External Power please be sure this jumpers are soldered as below :

so after soldering it will be like this image

All Electronics Components
All Electronics Components
All Electronics Components
All Electronics Components
All Electronics Components
All Electronics Components
All Electronics Components
All Electronics Components