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

Soldering Tools Kit
1 × 149 SAR
R301T Capacitive Fingerprint Module
1 × 173 SAR Subtotal: 322 SAR
Soldering Tools Kit
1 × 149 SAR
R301T Capacitive Fingerprint Module
1 × 173 SAR Subtotal: 322 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