System Image Protection: The can easily be supplied with additional power after the printer is turned off, allowing files to be saved securely before shutdown, thus protecting the system image from damage. Power Supply for : The USB-A port on the SKSM directly powers 3, 4B, and PI4B Adapter+CB1, offering a 5V 2A output. Current Limiting Protection: Prevents overcurrent issues during startup, ensuring smooth SKSM operation. color: Black Material: PCB+electronic components Package Contents: 1 x SKSM Power Protection Module 1 x Connecting Cable 1 Cable Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.