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

Joystick Shield for Arduino Robotics Control
1 × 46 SAR
MEGA Board for Arduino Mega 2560 Projects
1 × 135 SAR Subtotal: 181 SAR
Joystick Shield for Arduino Robotics Control
1 × 46 SAR
MEGA Board for Arduino Mega 2560 Projects
1 × 135 SAR Subtotal: 181 SAR
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